Wireless issues with Centrino Wireless-N 2230 on Ubuntu 14.04












1















I am having problems with my wireless adapter on Ubuntu 14.04. Sometimes when I boot the computer it is able to establish a connection, maybe one fifth of the time, but mostly it is just trying to connect forever:



 % nmcli nm
RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connecting enabled enabled enabled disabled


Even when it is able to establish a connection there are problems. After a long uptime the connection seems to get congested and is often dropped. The same thing happens if I try to stream video or download large files.



My current hardware setup is somewhat peculiar. I spilled soda all over my other laptop, ruining the motherboard, so I decided to put this hard drive into my old one (the one I am currently on) in order to keep all my files and settings. Everything worked right away except for the wifi.



On that old machine I had noticed problems with the wireless connection under low signal strength. I solved that problem by downgrading and putting the bcmwl-kernel-source on hold using apt-mark. But that option doesn't seem to exist for my current drivers. I have since purged the obsolete drivers to make sure there is no conflict, but that had no effect on the problem.



Other threads prompted my to try the following, but to no avail:



sudo apt-get install --reinstall linux-firmware
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi




System info:



 % sudo lshw -C network
*-network
description: Wireless interface
product: Centrino Wireless-N 2230
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: c4
serial: 60:6c:66:32:96:f5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.2.0-35-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:33 memory:f7d00000-f7d01fff




 % rfkill list                                                                                 
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
3: asus-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no




 % dmesg | grep iwl                                                                                       
[ 9.487676] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 9.514737] iwlwifi 0000:02:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[ 9.566860] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 9.566863] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 9.566865] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 9.566868] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 9.566968] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 9.630114] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 10.361252] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.368831] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
[ 10.613667] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.621565] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0




 % sudo iwlist wlan0 scan                                                                                                    
wlan0 Scan completed :
Cell 01 - Address: A0:21:B7:AC:C1:3C
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=39/70 Signal level=-71 dBm
Encryption key:on
ESSID:"JsNet"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000001928e67b
Extra: Last beacon: 32ms ago
IE: Unknown: 00054A734E6574
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010B
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101830003A4000027A4000042435E0062322F00
IE: Unknown: DD1E00904C33CC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: 2D1ACC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: DD1A00904C340B001B00000000000000000000000000000000000000
IE: Unknown: 3D160B001B00000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010002004000
IE: Unknown: DD860050F204104A0001101044000102103B0001031047001000000000000010000000A021B7ACC13C1021000D4E6574676561722C20496E632E10230008574E4452333730301024000456314831104200046E6F6E651054000800060050F204000110110017574E445233373030763228576972656C65737320415029100800020086103C000103




 % sudo iw wlan0 scan                                                                                                        
BSS a0:21:b7:ac:c1:3c (on wlan0)
TSF: 742840547 usec (0d, 00:12:22)
freq: 2462
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -71.00 dBm
last seen: 0 ms ago
SSID: JsNet
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 11
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: (0x0000)
ERP: <no flags>
Extended supported rates: 24.0 36.0 48.0 54.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
HT capabilities:
Capabilities: 0x11cc
HT20
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 0
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: 00000000-0000-1000-0000-a021b7acc13c
* Manufacturer: Netgear, Inc.
* Model: WNDR3700
* Model Number: V1H1
* Serial Number: none
* Primary Device Type: 6-0050f204-1
* Device name: WNDR3700v2(Wireless AP)
* Config methods: Ethernet, Label, PBC
* RF Bands: 0x3









share|improve this question
















bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
















  • Please edit your question to add the result of: dmesg | grep iwl.

    – chili555
    Apr 6 '16 at 23:22











  • Done, I added dmesg!

    – Harald Nordgren
    Apr 6 '16 at 23:34
















1















I am having problems with my wireless adapter on Ubuntu 14.04. Sometimes when I boot the computer it is able to establish a connection, maybe one fifth of the time, but mostly it is just trying to connect forever:



 % nmcli nm
RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connecting enabled enabled enabled disabled


Even when it is able to establish a connection there are problems. After a long uptime the connection seems to get congested and is often dropped. The same thing happens if I try to stream video or download large files.



My current hardware setup is somewhat peculiar. I spilled soda all over my other laptop, ruining the motherboard, so I decided to put this hard drive into my old one (the one I am currently on) in order to keep all my files and settings. Everything worked right away except for the wifi.



On that old machine I had noticed problems with the wireless connection under low signal strength. I solved that problem by downgrading and putting the bcmwl-kernel-source on hold using apt-mark. But that option doesn't seem to exist for my current drivers. I have since purged the obsolete drivers to make sure there is no conflict, but that had no effect on the problem.



Other threads prompted my to try the following, but to no avail:



sudo apt-get install --reinstall linux-firmware
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi




System info:



 % sudo lshw -C network
*-network
description: Wireless interface
product: Centrino Wireless-N 2230
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: c4
serial: 60:6c:66:32:96:f5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.2.0-35-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:33 memory:f7d00000-f7d01fff




 % rfkill list                                                                                 
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
3: asus-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no




 % dmesg | grep iwl                                                                                       
[ 9.487676] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 9.514737] iwlwifi 0000:02:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[ 9.566860] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 9.566863] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 9.566865] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 9.566868] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 9.566968] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 9.630114] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 10.361252] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.368831] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
[ 10.613667] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.621565] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0




 % sudo iwlist wlan0 scan                                                                                                    
wlan0 Scan completed :
Cell 01 - Address: A0:21:B7:AC:C1:3C
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=39/70 Signal level=-71 dBm
Encryption key:on
ESSID:"JsNet"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000001928e67b
Extra: Last beacon: 32ms ago
IE: Unknown: 00054A734E6574
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010B
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101830003A4000027A4000042435E0062322F00
IE: Unknown: DD1E00904C33CC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: 2D1ACC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: DD1A00904C340B001B00000000000000000000000000000000000000
IE: Unknown: 3D160B001B00000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010002004000
IE: Unknown: DD860050F204104A0001101044000102103B0001031047001000000000000010000000A021B7ACC13C1021000D4E6574676561722C20496E632E10230008574E4452333730301024000456314831104200046E6F6E651054000800060050F204000110110017574E445233373030763228576972656C65737320415029100800020086103C000103




 % sudo iw wlan0 scan                                                                                                        
BSS a0:21:b7:ac:c1:3c (on wlan0)
TSF: 742840547 usec (0d, 00:12:22)
freq: 2462
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -71.00 dBm
last seen: 0 ms ago
SSID: JsNet
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 11
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: (0x0000)
ERP: <no flags>
Extended supported rates: 24.0 36.0 48.0 54.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
HT capabilities:
Capabilities: 0x11cc
HT20
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 0
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: 00000000-0000-1000-0000-a021b7acc13c
* Manufacturer: Netgear, Inc.
* Model: WNDR3700
* Model Number: V1H1
* Serial Number: none
* Primary Device Type: 6-0050f204-1
* Device name: WNDR3700v2(Wireless AP)
* Config methods: Ethernet, Label, PBC
* RF Bands: 0x3









share|improve this question
















bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
















  • Please edit your question to add the result of: dmesg | grep iwl.

    – chili555
    Apr 6 '16 at 23:22











  • Done, I added dmesg!

    – Harald Nordgren
    Apr 6 '16 at 23:34














1












1








1


1






I am having problems with my wireless adapter on Ubuntu 14.04. Sometimes when I boot the computer it is able to establish a connection, maybe one fifth of the time, but mostly it is just trying to connect forever:



 % nmcli nm
RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connecting enabled enabled enabled disabled


Even when it is able to establish a connection there are problems. After a long uptime the connection seems to get congested and is often dropped. The same thing happens if I try to stream video or download large files.



My current hardware setup is somewhat peculiar. I spilled soda all over my other laptop, ruining the motherboard, so I decided to put this hard drive into my old one (the one I am currently on) in order to keep all my files and settings. Everything worked right away except for the wifi.



On that old machine I had noticed problems with the wireless connection under low signal strength. I solved that problem by downgrading and putting the bcmwl-kernel-source on hold using apt-mark. But that option doesn't seem to exist for my current drivers. I have since purged the obsolete drivers to make sure there is no conflict, but that had no effect on the problem.



Other threads prompted my to try the following, but to no avail:



sudo apt-get install --reinstall linux-firmware
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi




System info:



 % sudo lshw -C network
*-network
description: Wireless interface
product: Centrino Wireless-N 2230
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: c4
serial: 60:6c:66:32:96:f5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.2.0-35-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:33 memory:f7d00000-f7d01fff




 % rfkill list                                                                                 
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
3: asus-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no




 % dmesg | grep iwl                                                                                       
[ 9.487676] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 9.514737] iwlwifi 0000:02:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[ 9.566860] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 9.566863] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 9.566865] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 9.566868] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 9.566968] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 9.630114] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 10.361252] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.368831] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
[ 10.613667] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.621565] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0




 % sudo iwlist wlan0 scan                                                                                                    
wlan0 Scan completed :
Cell 01 - Address: A0:21:B7:AC:C1:3C
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=39/70 Signal level=-71 dBm
Encryption key:on
ESSID:"JsNet"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000001928e67b
Extra: Last beacon: 32ms ago
IE: Unknown: 00054A734E6574
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010B
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101830003A4000027A4000042435E0062322F00
IE: Unknown: DD1E00904C33CC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: 2D1ACC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: DD1A00904C340B001B00000000000000000000000000000000000000
IE: Unknown: 3D160B001B00000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010002004000
IE: Unknown: DD860050F204104A0001101044000102103B0001031047001000000000000010000000A021B7ACC13C1021000D4E6574676561722C20496E632E10230008574E4452333730301024000456314831104200046E6F6E651054000800060050F204000110110017574E445233373030763228576972656C65737320415029100800020086103C000103




 % sudo iw wlan0 scan                                                                                                        
BSS a0:21:b7:ac:c1:3c (on wlan0)
TSF: 742840547 usec (0d, 00:12:22)
freq: 2462
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -71.00 dBm
last seen: 0 ms ago
SSID: JsNet
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 11
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: (0x0000)
ERP: <no flags>
Extended supported rates: 24.0 36.0 48.0 54.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
HT capabilities:
Capabilities: 0x11cc
HT20
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 0
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: 00000000-0000-1000-0000-a021b7acc13c
* Manufacturer: Netgear, Inc.
* Model: WNDR3700
* Model Number: V1H1
* Serial Number: none
* Primary Device Type: 6-0050f204-1
* Device name: WNDR3700v2(Wireless AP)
* Config methods: Ethernet, Label, PBC
* RF Bands: 0x3









share|improve this question
















I am having problems with my wireless adapter on Ubuntu 14.04. Sometimes when I boot the computer it is able to establish a connection, maybe one fifth of the time, but mostly it is just trying to connect forever:



 % nmcli nm
RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connecting enabled enabled enabled disabled


Even when it is able to establish a connection there are problems. After a long uptime the connection seems to get congested and is often dropped. The same thing happens if I try to stream video or download large files.



My current hardware setup is somewhat peculiar. I spilled soda all over my other laptop, ruining the motherboard, so I decided to put this hard drive into my old one (the one I am currently on) in order to keep all my files and settings. Everything worked right away except for the wifi.



On that old machine I had noticed problems with the wireless connection under low signal strength. I solved that problem by downgrading and putting the bcmwl-kernel-source on hold using apt-mark. But that option doesn't seem to exist for my current drivers. I have since purged the obsolete drivers to make sure there is no conflict, but that had no effect on the problem.



Other threads prompted my to try the following, but to no avail:



sudo apt-get install --reinstall linux-firmware
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi




System info:



 % sudo lshw -C network
*-network
description: Wireless interface
product: Centrino Wireless-N 2230
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: c4
serial: 60:6c:66:32:96:f5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.2.0-35-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:33 memory:f7d00000-f7d01fff




 % rfkill list                                                                                 
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
3: asus-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no




 % dmesg | grep iwl                                                                                       
[ 9.487676] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 9.514737] iwlwifi 0000:02:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[ 9.566860] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 9.566863] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 9.566865] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 9.566868] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 9.566968] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 9.630114] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 10.361252] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.368831] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
[ 10.613667] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 10.621565] iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0




 % sudo iwlist wlan0 scan                                                                                                    
wlan0 Scan completed :
Cell 01 - Address: A0:21:B7:AC:C1:3C
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=39/70 Signal level=-71 dBm
Encryption key:on
ESSID:"JsNet"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000001928e67b
Extra: Last beacon: 32ms ago
IE: Unknown: 00054A734E6574
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010B
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101830003A4000027A4000042435E0062322F00
IE: Unknown: DD1E00904C33CC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: 2D1ACC111BFFFF000000000000000000000000000000000000000000
IE: Unknown: DD1A00904C340B001B00000000000000000000000000000000000000
IE: Unknown: 3D160B001B00000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010002004000
IE: Unknown: DD860050F204104A0001101044000102103B0001031047001000000000000010000000A021B7ACC13C1021000D4E6574676561722C20496E632E10230008574E4452333730301024000456314831104200046E6F6E651054000800060050F204000110110017574E445233373030763228576972656C65737320415029100800020086103C000103




 % sudo iw wlan0 scan                                                                                                        
BSS a0:21:b7:ac:c1:3c (on wlan0)
TSF: 742840547 usec (0d, 00:12:22)
freq: 2462
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -71.00 dBm
last seen: 0 ms ago
SSID: JsNet
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 11
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: (0x0000)
ERP: <no flags>
Extended supported rates: 24.0 36.0 48.0 54.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
HT capabilities:
Capabilities: 0x11cc
HT20
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 0
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: 00000000-0000-1000-0000-a021b7acc13c
* Manufacturer: Netgear, Inc.
* Model: WNDR3700
* Model Number: V1H1
* Serial Number: none
* Primary Device Type: 6-0050f204-1
* Device name: WNDR3700v2(Wireless AP)
* Config methods: Ethernet, Label, PBC
* RF Bands: 0x3






14.04 networking drivers intel-wireless






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edited Apr 8 '16 at 0:00







Harald Nordgren

















asked Apr 6 '16 at 22:53









Harald NordgrenHarald Nordgren

12318




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  • Please edit your question to add the result of: dmesg | grep iwl.

    – chili555
    Apr 6 '16 at 23:22











  • Done, I added dmesg!

    – Harald Nordgren
    Apr 6 '16 at 23:34



















  • Please edit your question to add the result of: dmesg | grep iwl.

    – chili555
    Apr 6 '16 at 23:22











  • Done, I added dmesg!

    – Harald Nordgren
    Apr 6 '16 at 23:34

















Please edit your question to add the result of: dmesg | grep iwl.

– chili555
Apr 6 '16 at 23:22





Please edit your question to add the result of: dmesg | grep iwl.

– chili555
Apr 6 '16 at 23:22













Done, I added dmesg!

– Harald Nordgren
Apr 6 '16 at 23:34





Done, I added dmesg!

– Harald Nordgren
Apr 6 '16 at 23:34










1 Answer
1






active

oldest

votes


















0














First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.



Next, I recommend that your regulatory domain be set explicitly. Check yours:



sudo iw reg get


If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:



sudo iw reg set IS


Of course, substitute your country code if not Iceland. Set it permanently:



gksudo gedit /etc/default/crda


Use nano or kate or leafpad if you don't have the text editor gedit.



Change the last line to read:



REGDOMAIN=IS


Proofread carefully, save and close the text editor.



Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.



If these changes do not help, please try:



sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8


If it helps, make it permanent:



sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit





share|improve this answer
























  • Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

    – Harald Nordgren
    Apr 7 '16 at 1:52











  • You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

    – chili555
    Apr 7 '16 at 13:27











  • Okay, I added iwlist and iw scans now.

    – Harald Nordgren
    Apr 7 '16 at 20:50











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1 Answer
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1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes









0














First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.



Next, I recommend that your regulatory domain be set explicitly. Check yours:



sudo iw reg get


If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:



sudo iw reg set IS


Of course, substitute your country code if not Iceland. Set it permanently:



gksudo gedit /etc/default/crda


Use nano or kate or leafpad if you don't have the text editor gedit.



Change the last line to read:



REGDOMAIN=IS


Proofread carefully, save and close the text editor.



Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.



If these changes do not help, please try:



sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8


If it helps, make it permanent:



sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit





share|improve this answer
























  • Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

    – Harald Nordgren
    Apr 7 '16 at 1:52











  • You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

    – chili555
    Apr 7 '16 at 13:27











  • Okay, I added iwlist and iw scans now.

    – Harald Nordgren
    Apr 7 '16 at 20:50
















0














First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.



Next, I recommend that your regulatory domain be set explicitly. Check yours:



sudo iw reg get


If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:



sudo iw reg set IS


Of course, substitute your country code if not Iceland. Set it permanently:



gksudo gedit /etc/default/crda


Use nano or kate or leafpad if you don't have the text editor gedit.



Change the last line to read:



REGDOMAIN=IS


Proofread carefully, save and close the text editor.



Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.



If these changes do not help, please try:



sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8


If it helps, make it permanent:



sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit





share|improve this answer
























  • Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

    – Harald Nordgren
    Apr 7 '16 at 1:52











  • You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

    – chili555
    Apr 7 '16 at 13:27











  • Okay, I added iwlist and iw scans now.

    – Harald Nordgren
    Apr 7 '16 at 20:50














0












0








0







First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.



Next, I recommend that your regulatory domain be set explicitly. Check yours:



sudo iw reg get


If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:



sudo iw reg set IS


Of course, substitute your country code if not Iceland. Set it permanently:



gksudo gedit /etc/default/crda


Use nano or kate or leafpad if you don't have the text editor gedit.



Change the last line to read:



REGDOMAIN=IS


Proofread carefully, save and close the text editor.



Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.



If these changes do not help, please try:



sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8


If it helps, make it permanent:



sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit





share|improve this answer













First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.



Next, I recommend that your regulatory domain be set explicitly. Check yours:



sudo iw reg get


If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:



sudo iw reg set IS


Of course, substitute your country code if not Iceland. Set it permanently:



gksudo gedit /etc/default/crda


Use nano or kate or leafpad if you don't have the text editor gedit.



Change the last line to read:



REGDOMAIN=IS


Proofread carefully, save and close the text editor.



Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.



If these changes do not help, please try:



sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8


If it helps, make it permanent:



sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit






share|improve this answer












share|improve this answer



share|improve this answer










answered Apr 7 '16 at 0:21









chili555chili555

39k55280




39k55280













  • Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

    – Harald Nordgren
    Apr 7 '16 at 1:52











  • You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

    – chili555
    Apr 7 '16 at 13:27











  • Okay, I added iwlist and iw scans now.

    – Harald Nordgren
    Apr 7 '16 at 20:50



















  • Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

    – Harald Nordgren
    Apr 7 '16 at 1:52











  • You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

    – chili555
    Apr 7 '16 at 13:27











  • Okay, I added iwlist and iw scans now.

    – Harald Nordgren
    Apr 7 '16 at 20:50

















Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

– Harald Nordgren
Apr 7 '16 at 1:52





Thanks for taking the time! I set the regulatory domain, ignored IPv6 and tried 11n_disable=8. None of it made any difference unfortunately. I don't have direct access to the router as it belongs to my landlord, but I will try to talk to him about it. For those times that I am able to connect to the network, is there any way for me to check the WPA mode and channel width as a non-admin?

– Harald Nordgren
Apr 7 '16 at 1:52













You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

– chili555
Apr 7 '16 at 13:27





You can find out about it with: sudo iwlist scan Post your landlord's router only, not all the others in the neighborhood, and we'll help you decipher it.

– chili555
Apr 7 '16 at 13:27













Okay, I added iwlist and iw scans now.

– Harald Nordgren
Apr 7 '16 at 20:50





Okay, I added iwlist and iw scans now.

– Harald Nordgren
Apr 7 '16 at 20:50


















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