Jtdcftul

After my Ubuntu (18.04) machine went to sleep it is unable to connect to wireless networks. No wireless networks shows up in the GUI. I've tried most of the solutions presented to me after many Google queries but nothing does the trick. It is possible that the battery ran out as well during sleep which might've caused the problem.

I tried:

sudo service network-manager restart 

sudo systemctl restart network-manager

but to no avail.

sudo /etc/init.d/networking restart

gets stuck but eventually says "Failed to start Raise network interfaces."

I checked ifconfig -a which gave me five network interfaces. Before the malfunction I had three interfaces.
lo, enp0s31f6 and wlp1s0 existed before.
The newly added ones are enp0s31f6:avahi and wlp1s0:avahi.
All of the interfaces are UP but only the avahi interfaces has IP addresses.

I tried:

ifconfig <interface> down

ifconfig <interface> up

for all of the network interfaces (only lo says RUNNING right now but wlp used to before sleeping)

I tried changing /etc/network/interfaces to static and then back again

auto lo

iface lo inet loopback



auto wlp1s0

iface wlp1s0 inet dhcp



auto enp0s31f6

iface enp0s31f6 inet dhcp

I tried sudo iwlist scan which shows me the network I want to connect to. iwconfig has data for wlp1s0 but lo and enp0s31f6 says "no wireless extensions". Tx-Power=0 though so I tried

iwconfig wlp1s0 txpower off

iwconfig wlp1s0 txpower on

I tried:

nmcli radio wifi off

nmcli radio wifi on

I also checked the routing table which looks odd to me. There are four entries and two of these are duplicates. netstat -r

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface

default         0.0.0.0         0.0.0.0         UG        0 0          0 enp0s31f6

default         0.0.0.0         0.0.0.0         U         0 0          0 wlp1s0

link-local      0.0.0.0         255.255.0.0     U         0 0          0 wlp1s0

link-local      0.0.0.0         255.255.0.0     U         0 0          0 enp0s31f6

When typing rfkill list
it says that wireless LAN is neither soft nor hard blocked.

I have rebooted multiple times after changes to settings and files were made.

I'm a Linux novice so any help and explanations are appreciated. Thanks!