Rebooted after updates and then this morning : general protection fault: 0000 [#26] SMP

[Thomas A. F. Thorne]

The first 4 error reports suggested that they were duplicates, so I have only raised https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1453029 this error report seems to have not done so so I have raised a 2nd ticket in case it gets more debug added automatically that is of use.

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I noticed a problem last week where my GUI locked up while I was trying to unlock it. At the time I was unable to get the system to generate a report or find anything obvious to me in the logs, though I am no expert. I did manage to enable some more analysis tools for next time and it seems that next time has just occurred.

Today I tried to login to the system after rebooting it last night. The screen progressed passed the password entry but failed to display the desktop background, the side bar or the top bar. I left it for a few minutes while I got a coffee but it was still in the same state when I returned. Thinking it might just be the GUI locked up, as it seemed to be last week, I tried to ssh in from another machine.

tt@172.16.20.39's password:
Welcome to Ubuntu 14.04.2 LTS (GNU/Linux 3.16.0-37-generic x86_64)

 * Documentation: https://help.ubuntu.com/

Last login: Fri May 1 12:46:41 2015 from 172.16.20.98

tt@tt-ul-dt:~$
tt@tt-ul-dt:~$
tt@tt-ul-dt:~$ top
Segmentation fault
tt@tt-ul-dt:~$ ps

As you can see, I managed to SSH in but failed to do much else. When I tried to take a look at what was going on with top I got a message about a Segmentation fault. I then tried ps thinking that might be a simpler program and able to show me something. That seemed to lock up the ssh session.

Next I did a quick Google to see what I might be able to do remotely to help debug things. Nothing helpful presented itself to me so I did Ctrl + Alt + F4 to try and get access via one of the other virtual terminal things. I was able to enter my username and password but as soon as I had done so I seemed to get some sort of log trace on the screen. It mentioned the USB mouse I had being connected. I was not able to enter any commands so instead I tried unplugging and reconnecting the USB memory stick I had. I could see it registering in the trace. I did the same with a USB temperature probe and could see it connect too.

After that I figured a clean shutdown was about the best I could do. I found http://askubuntu.com/questions/53263/shut-down-computer-from-keyboard and started the Alt + SysRq + r, e, i, s, u, o. The first two of three keys reported that they were disabled but after that it seemed to work.

After the shutdown, I left the machine till 09:01 and powered it on again. It booted, I logged in and was then presented with several "System program problem detected" messages. I am now trying to work through them in the sequence they were presented.

ProblemType: KernelOops
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-37-generic 3.16.0-37.49~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-37.49~14.04.1-generic 3.16.7-ckt9
Uname: Linux 3.16.0-37-generic x86_64
Annotation: Your system might become unstable now and might need to be restarted.
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
Date: Thu May 7 17:37:48 2015
Failure: oops
InstallationDate: Installed on 2015-03-12 (56 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
Title: general protection fault: 0000 [#26] SMP
UpgradeStatus: No upgrade log present (probably fresh install)