I now have this issue, I have noticed that is only occuring with the Google Chrome/Chromium packages. I also noticed that this error resets Xorg. I have included the Xorg.0.log file where the Seg Fault is.
OS : Ubuntu 12.04 Video Driver : NVidia version 319 (Recommended / Stable) CPU : 8 Core Dual Intel(R) Xeon(R) CPU E5506 @ 2.13GHz Memory : 16 G To replicate this error / known bug; simply log in, and start google chrome or chromium, count 2 or 3 seconds and whamo, seg fault. [Begin Xorg Output] [ 3260.021] (II) NVIDIA(GPU-0): Vision stereo. [ 3260.021] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display [ 3260.021] (**) NVIDIA(0): device DELL E176FP (CRT-1) (Using EDID frequencies has [ 3260.021] (**) NVIDIA(0): been enabled on all display devices.) [ 3260.102] (II) XKB: reuse xkmfile /var/lib/xkb/server-03AF3717FF3AB439A4BAABA686CCB40771CDF520.xkm [ 3280.265] (II) NVIDIA(GPU-0): Display (DELL E176FP (CRT-0)) does not support NVIDIA 3D [ 3280.265] (II) NVIDIA(GPU-0): Vision stereo. [ 3280.265] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display [ 3280.265] (**) NVIDIA(0): device DELL E176FP (CRT-0) (Using EDID frequencies has [ 3280.265] (**) NVIDIA(0): been enabled on all display devices.) [ 3280.281] (II) NVIDIA(GPU-0): Display (DELL E176FP (CRT-1)) does not support NVIDIA 3D [ 3280.281] (II) NVIDIA(GPU-0): Vision stereo. [ 3280.281] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display [ 3280.281] (**) NVIDIA(0): device DELL E176FP (CRT-1) (Using EDID frequencies has [ 3280.281] (**) NVIDIA(0): been enabled on all display devices.) [ 3942.556] Backtrace: [ 3942.557] 0: /usr/bin/X (xorg_backtrace+0x26) [0x7f5f3648ba86] [ 3942.557] 1: /usr/bin/X (0x7f5f36303000+0x18c92a) [0x7f5f3648f92a] [ 3942.557] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f5f35629000+0xfcb0) [0x7f5f35638cb0] [ 3942.557] Segmentation fault at address (nil) [ 3942.557] Caught signal 11 (Segmentation fault). Server aborting [ 3942.557] Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 3942.557] Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 3942.557] [ 3942.684] (II) evdev: Power Button: Close [ 3942.684] (II) UnloadModule: "evdev" [ 3942.684] (II) Unloading evdev [ 3942.764] (II) evdev: Power Button: Close [ 3942.764] (II) UnloadModule: "evdev" [ 3942.764] (II) Unloading evdev [ 3942.764] (II) evdev: USB2.0 PC CAMERA: Close [ 3942.764] (II) UnloadModule: "evdev" [ 3942.764] (II) Unloading evdev -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/980519 Title: Random log off in Ubuntu 12.04 LTS Status in Unity: Fix Released Status in “nvidia-graphics-drivers” package in Ubuntu: Fix Released Status in “xorg” package in Ubuntu: Fix Released Status in Fedora: New Bug description: I get logged off from Ubuntu sometimes. There is no error message or any indication that it is going to log off. The screen goes black, and after 2-4 seconds, i get presented with the Ubuntu Log On Screen. There is no clear pattern (or at least if have not noticed any). One time i am working with Netbeans, another time i am using firefox. This also means that at present i can not clearly say what package might be causing this behaviour. I am fairly sure the problem lies in 12.04 (or more precise - the combination of 12.04 and the hardware i am using). I do not have the same problem running 11.04 or 11.10. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/980519/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp