How to troubleshoot a (near total) freeze?

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I'm running Gnome on Ubuntu 17.04. I had gnome-terminal in fullscreen, neovim in a tmux session, a background process compiling code, and Chromium running as well, when my system froze up on me. I could move the mouse cursor, barely, with extreme lag, but that's all I could do. I waited several minutes, then tried Ctrl-C, Ctrl-Alt-Delete, Alt-F2, but nothing responded.



Finally, I gave up and held down the power button until the machine shut down.



What I'm wondering is, how can I troubleshoot this? Is there something else I could have tried before forcing a shutdown? Are there logs I can inspect to see what happened? I tried journalctrl after rebooting, but it only shows logs from the current boot. I also see some log files in ~/.local/share/xorg/, but I'm not sure if they're relevant, or what to search for.







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    I'm running Gnome on Ubuntu 17.04. I had gnome-terminal in fullscreen, neovim in a tmux session, a background process compiling code, and Chromium running as well, when my system froze up on me. I could move the mouse cursor, barely, with extreme lag, but that's all I could do. I waited several minutes, then tried Ctrl-C, Ctrl-Alt-Delete, Alt-F2, but nothing responded.



    Finally, I gave up and held down the power button until the machine shut down.



    What I'm wondering is, how can I troubleshoot this? Is there something else I could have tried before forcing a shutdown? Are there logs I can inspect to see what happened? I tried journalctrl after rebooting, but it only shows logs from the current boot. I also see some log files in ~/.local/share/xorg/, but I'm not sure if they're relevant, or what to search for.







    share|improve this question






















      up vote
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      up vote
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      down vote

      favorite











      I'm running Gnome on Ubuntu 17.04. I had gnome-terminal in fullscreen, neovim in a tmux session, a background process compiling code, and Chromium running as well, when my system froze up on me. I could move the mouse cursor, barely, with extreme lag, but that's all I could do. I waited several minutes, then tried Ctrl-C, Ctrl-Alt-Delete, Alt-F2, but nothing responded.



      Finally, I gave up and held down the power button until the machine shut down.



      What I'm wondering is, how can I troubleshoot this? Is there something else I could have tried before forcing a shutdown? Are there logs I can inspect to see what happened? I tried journalctrl after rebooting, but it only shows logs from the current boot. I also see some log files in ~/.local/share/xorg/, but I'm not sure if they're relevant, or what to search for.







      share|improve this question












      I'm running Gnome on Ubuntu 17.04. I had gnome-terminal in fullscreen, neovim in a tmux session, a background process compiling code, and Chromium running as well, when my system froze up on me. I could move the mouse cursor, barely, with extreme lag, but that's all I could do. I waited several minutes, then tried Ctrl-C, Ctrl-Alt-Delete, Alt-F2, but nothing responded.



      Finally, I gave up and held down the power button until the machine shut down.



      What I'm wondering is, how can I troubleshoot this? Is there something else I could have tried before forcing a shutdown? Are there logs I can inspect to see what happened? I tried journalctrl after rebooting, but it only shows logs from the current boot. I also see some log files in ~/.local/share/xorg/, but I'm not sure if they're relevant, or what to search for.









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      asked Nov 11 '17 at 3:51









      ivan

      650718




      650718




















          1 Answer
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          The following logs can help you debug your system from the last boot:



          journalctl --boot=-1 | less

          tail /var/log/syslog.1
          tail /var/log/kern.log.1
          tail /var/log/debug.1
          tail /var/log/Xorg.0.log.old





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          • Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
            – ivan
            Nov 11 '17 at 12:33










          • Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
            – jdwolf
            Nov 11 '17 at 12:47










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          1 Answer
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          1 Answer
          1






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          up vote
          0
          down vote



          accepted










          The following logs can help you debug your system from the last boot:



          journalctl --boot=-1 | less

          tail /var/log/syslog.1
          tail /var/log/kern.log.1
          tail /var/log/debug.1
          tail /var/log/Xorg.0.log.old





          share|improve this answer




















          • Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
            – ivan
            Nov 11 '17 at 12:33










          • Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
            – jdwolf
            Nov 11 '17 at 12:47














          up vote
          0
          down vote



          accepted










          The following logs can help you debug your system from the last boot:



          journalctl --boot=-1 | less

          tail /var/log/syslog.1
          tail /var/log/kern.log.1
          tail /var/log/debug.1
          tail /var/log/Xorg.0.log.old





          share|improve this answer




















          • Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
            – ivan
            Nov 11 '17 at 12:33










          • Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
            – jdwolf
            Nov 11 '17 at 12:47












          up vote
          0
          down vote



          accepted







          up vote
          0
          down vote



          accepted






          The following logs can help you debug your system from the last boot:



          journalctl --boot=-1 | less

          tail /var/log/syslog.1
          tail /var/log/kern.log.1
          tail /var/log/debug.1
          tail /var/log/Xorg.0.log.old





          share|improve this answer












          The following logs can help you debug your system from the last boot:



          journalctl --boot=-1 | less

          tail /var/log/syslog.1
          tail /var/log/kern.log.1
          tail /var/log/debug.1
          tail /var/log/Xorg.0.log.old






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 11 '17 at 4:26









          jdwolf

          2,392116




          2,392116











          • Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
            – ivan
            Nov 11 '17 at 12:33










          • Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
            – jdwolf
            Nov 11 '17 at 12:47
















          • Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
            – ivan
            Nov 11 '17 at 12:33










          • Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
            – jdwolf
            Nov 11 '17 at 12:47















          Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
          – ivan
          Nov 11 '17 at 12:33




          Unfortunately, I didn't have logs persisting across boots. I've updated my journald configuration so if it happens again I'll have a better chance of getting insight into the issue.
          – ivan
          Nov 11 '17 at 12:33












          Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
          – jdwolf
          Nov 11 '17 at 12:47




          Debian keeps logs by default. I assumed Ubuntu did as well. I think you should add your configuration change to the answer.
          – jdwolf
          Nov 11 '17 at 12:47

















           

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