ubuntu log out automatically

[mapan]

I installed ubuntu11.10 on my laptop,but now it often log out automatically without any prediction. So annoying.
I've already googled this problem but still couldn't solve it.
Could anyone help me out?
Thank you.
---
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
DistroCodename: oneiric
DistroRelease: Ubuntu 11.10
DistroVariant: ubuntu
Package: xorg 1:7.6+7ubuntu7
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Tags: oneiric running-unity ubuntu
Uname: Linux 3.0.0-12-generic x86_64
UnreportableReason: Please work this issue through technical support channels first.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Phil. V (philip.v)]

Thanks for your bug report. I'm re-targeting this to xorg, as it is the correct package for problems like this. I'm not familiar with debugging xorg issues, but I can help you attach relevant system information and log files so that others can help you. From a terminal could you please run the following command:
apport-collect 887794

After you do that you can go ahead and change the status of this report back to new.

[mapan (mapan0817)]

apport information

[mapan (mapan0817)]

apport information

[Bryce Harrington (bryce)]

This sounds like an X crash however apport-collect appears to have failed to attach the logs we need. Perhaps you can do this manually. Please attach the following from right after reproducing this bug:

  * /var/log/Xorg.0.log
  * /var/log/Xorg.0.log.old
  * /etc/X11/xorg.conf
  * sudo dmesg > dmesg.txt
  * lspci > lspci.txt

Thanks ahead of time.

[Enternix (enternix)]

I have the same problem: Bug #899531 (already marked as duplicate).
Since I removed Ubuntu 11.04 and installed 11.10, the system crashes nearly everyday without any prior warning and the login-screen appears. The same behavior in Gnome 3. Only LXDE seems to work (no crashes since I installed it before 10 days).

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original bug reporter. However, if the issue still exists in the latest development version of Ubuntu and you are the original reporter please feel free to reopen with the requested information. If you are not the original reporter, please don't reopen this one but instead file a new bug and reference this one.