Why is my terminal freezing up?
10
Sometimes when my terminal freezes up and it will not let me type. I can not identify any causes, nor how to diagnose. Any suggestions?
Thanks!
GNOME Terminal 2.30.2 on Ubuntu 10.04
10.04 command-line freeze
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
add a comment |
10
Sometimes when my terminal freezes up and it will not let me type. I can not identify any causes, nor how to diagnose. Any suggestions?
Thanks!
GNOME Terminal 2.30.2 on Ubuntu 10.04
10.04 command-line freeze
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
2
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you runtopin a terminal, you should be able to locate the problem easily.
– RolandiXor♦
Nov 30 '10 at 2:37
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46
add a comment |
10
10
10
2
Sometimes when my terminal freezes up and it will not let me type. I can not identify any causes, nor how to diagnose. Any suggestions?
Thanks!
GNOME Terminal 2.30.2 on Ubuntu 10.04
10.04 command-line freeze
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
Sometimes when my terminal freezes up and it will not let me type. I can not identify any causes, nor how to diagnose. Any suggestions?
Thanks!
GNOME Terminal 2.30.2 on Ubuntu 10.04
10.04 command-line freeze
10.04 command-line freeze
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
asked Nov 30 '10 at 2:24
David LeBauerDavid LeBauer
84741335
84741335
2
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you runtopin a terminal, you should be able to locate the problem easily.
– RolandiXor♦
Nov 30 '10 at 2:37
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46
add a comment |
2
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you runtopin a terminal, you should be able to locate the problem easily.
– RolandiXor♦
Nov 30 '10 at 2:37
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46
2
2
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you run
top in a terminal, you should be able to locate the problem easily.– RolandiXor♦
Nov 30 '10 at 2:37
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you run
top in a terminal, you should be able to locate the problem easily.– RolandiXor♦
Nov 30 '10 at 2:37
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46
add a comment |
3 Answers
3
active
oldest
votes
14
A good general way to diagnose mysterious hangs:
- open a(nother) terminal, and use
ps axo pid,wchan:32,cmdto find the other process id - note the
wchancolumn, which should tell you whether it's stuck in the kernel - run
sudo strace -p PIDinserting the pid of that process; paste that into a bug report or question
If there's anything aside from just a dash in the wchan column, then the process is in the kernel doing something. Some typical values:
futex_wait_queue_me- waiting on a futex for another thread in the same process
poll_schedule_timeout- waiting for network or interprocess communication, or just sleeping for a while
pipe_wait- reading/writing a pipe
There are thousands of possibilities so I can't list them all. See What is the "Waiting Channel" of a process? for more.
edited Apr 13 '17 at 12:24
Community♦
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Anywchanmeans the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)
– poolie
Dec 11 '15 at 6:08
add a comment |
20
Did you press Ctrl+S by any chance? It's the terminal pause key that stops all output until you press Ctrl-Q to resume.
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
add a comment |
0
Mine is weird whenever I install something it fails and freezes and I have to restart ubuntu...
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
14
A good general way to diagnose mysterious hangs:
- open a(nother) terminal, and use
ps axo pid,wchan:32,cmdto find the other process id - note the
wchancolumn, which should tell you whether it's stuck in the kernel - run
sudo strace -p PIDinserting the pid of that process; paste that into a bug report or question
If there's anything aside from just a dash in the wchan column, then the process is in the kernel doing something. Some typical values:
futex_wait_queue_me- waiting on a futex for another thread in the same process
poll_schedule_timeout- waiting for network or interprocess communication, or just sleeping for a while
pipe_wait- reading/writing a pipe
There are thousands of possibilities so I can't list them all. See What is the "Waiting Channel" of a process? for more.
edited Apr 13 '17 at 12:24
Community♦
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Anywchanmeans the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)
– poolie
Dec 11 '15 at 6:08
add a comment |
14
A good general way to diagnose mysterious hangs:
- open a(nother) terminal, and use
ps axo pid,wchan:32,cmdto find the other process id - note the
wchancolumn, which should tell you whether it's stuck in the kernel - run
sudo strace -p PIDinserting the pid of that process; paste that into a bug report or question
If there's anything aside from just a dash in the wchan column, then the process is in the kernel doing something. Some typical values:
futex_wait_queue_me- waiting on a futex for another thread in the same process
poll_schedule_timeout- waiting for network or interprocess communication, or just sleeping for a while
pipe_wait- reading/writing a pipe
There are thousands of possibilities so I can't list them all. See What is the "Waiting Channel" of a process? for more.
edited Apr 13 '17 at 12:24
Community♦
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Anywchanmeans the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)
– poolie
Dec 11 '15 at 6:08
add a comment |
14
14
14
A good general way to diagnose mysterious hangs:
- open a(nother) terminal, and use
ps axo pid,wchan:32,cmdto find the other process id - note the
wchancolumn, which should tell you whether it's stuck in the kernel - run
sudo strace -p PIDinserting the pid of that process; paste that into a bug report or question
If there's anything aside from just a dash in the wchan column, then the process is in the kernel doing something. Some typical values:
futex_wait_queue_me- waiting on a futex for another thread in the same process
poll_schedule_timeout- waiting for network or interprocess communication, or just sleeping for a while
pipe_wait- reading/writing a pipe
There are thousands of possibilities so I can't list them all. See What is the "Waiting Channel" of a process? for more.
edited Apr 13 '17 at 12:24
Community♦
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
A good general way to diagnose mysterious hangs:
- open a(nother) terminal, and use
ps axo pid,wchan:32,cmdto find the other process id - note the
wchancolumn, which should tell you whether it's stuck in the kernel - run
sudo strace -p PIDinserting the pid of that process; paste that into a bug report or question
If there's anything aside from just a dash in the wchan column, then the process is in the kernel doing something. Some typical values:
futex_wait_queue_me- waiting on a futex for another thread in the same process
poll_schedule_timeout- waiting for network or interprocess communication, or just sleeping for a while
pipe_wait- reading/writing a pipe
There are thousands of possibilities so I can't list them all. See What is the "Waiting Channel" of a process? for more.
edited Apr 13 '17 at 12:24
Community♦
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
edited Apr 13 '17 at 12:24
Community♦
1
edited Apr 13 '17 at 12:24
Community♦
1
edited Apr 13 '17 at 12:24
Community♦
1
1
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
answered Nov 30 '10 at 3:12
pooliepoolie
7,30823158
7,30823158
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Anywchanmeans the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)
– poolie
Dec 11 '15 at 6:08
add a comment |
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Anywchanmeans the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)
– poolie
Dec 11 '15 at 6:08
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Very useful for general purpose bug tracking. Can you please update your answer with some extensive description ? What message in wchan column indicates a program that is stuck in the kernel ?
– Salih Emin
Nov 30 '10 at 13:19
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
Thanks, Salih. Maybe we should have another question about how in general to diagnose hangs?
– poolie
Nov 30 '10 at 21:42
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
If people are curious about any other wchan values, please add a comment.
– poolie
Mar 14 '12 at 0:37
Any
wchan means the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)– poolie
Dec 11 '15 at 6:08
Any
wchan means the process is waiting in the kernel. If it stays there for a long time and for no good reason like listening for network io, then it's stuck. ;)– poolie
Dec 11 '15 at 6:08
add a comment |
20
Did you press Ctrl+S by any chance? It's the terminal pause key that stops all output until you press Ctrl-Q to resume.
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
add a comment |
20
Did you press Ctrl+S by any chance? It's the terminal pause key that stops all output until you press Ctrl-Q to resume.
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
add a comment |
20
20
20
Did you press Ctrl+S by any chance? It's the terminal pause key that stops all output until you press Ctrl-Q to resume.
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
Did you press Ctrl+S by any chance? It's the terminal pause key that stops all output until you press Ctrl-Q to resume.
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
answered Nov 30 '10 at 12:16
Marius GedminasMarius Gedminas
7,42573647
7,42573647
add a comment |
add a comment |
0
Mine is weird whenever I install something it fails and freezes and I have to restart ubuntu...
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
0
Mine is weird whenever I install something it fails and freezes and I have to restart ubuntu...
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
0
0
0
Mine is weird whenever I install something it fails and freezes and I have to restart ubuntu...
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Mine is weird whenever I install something it fails and freezes and I have to restart ubuntu...
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 29 mins ago
CosmicskylightCosmicskylight
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 29 mins ago
CosmicskylightCosmicskylight
1
answered 29 mins ago
CosmicskylightCosmicskylight
1
1
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Cosmicskylight is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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2
usually when the terminal freezes it is caused by another application in the background using too many resources, like the CPU or Disk I/O. If you run
topin a terminal, you should be able to locate the problem easily.– RolandiXor♦
Nov 30 '10 at 2:37
@roland - sounds like a catch-22, but good advice since sometimes when one terminal is frozen I can open another and it will work.
– David LeBauer
Nov 30 '10 at 2:38
I Know right? :) It is a bit of a catch-22, but it often works for me.
– RolandiXor♦
Nov 30 '10 at 2:46