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[Stephan <620478@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This is similar to bug 578750, but on my system this particular bug only
started to occur recently.

I'm getting frequent crashes of the X server with this stacktrace in the
logs:

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e938b]
1: /usr/bin/X (0x8048000+0x61c8d) [0x80a9c8d]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0x7c8410]
Segmentation fault at address 0x40080884

This was without debugging symbols, a version after I installed xorg
with debugging symbols can be found in  Xorg.0.log.old

More info:
I'm using "nv" driver with TwinView (via xorg.conf) and this configuration has been working pretty stable for a while. I can't precisely say, when instability returned, but possibly the upgrade of xserver-xorg-core to 2:1.7.6-2ubuntu7.3 escalated this situation. I did the upgrade three days ago, and while it feels that the situation started earlier than that, during the last (3) days the system crashed several times a day (or even: hour).

Suspecting TwinView  to have a finger in the pie I disabled TwinViw  but
X crashed only a few seconds after restarting.

It can't see a connection to any application, usually I'm in Eclipse
(with gtk) when it happens, but that's only where I spend most of the
time. The crash might be related to either some mouse activity (never
saw it without doing something with the mouse). One crash, e.g.,
happened about when I clicked on the (KDE) desktop.

Another symptom I've been seeing is not crashing but freezing (no
reaction to any input device, including not-working keyboard LEDs) - not
sure if this is related. Usually, when the system freezes first the full
screen flickers shortly before the freeze - and I believe this symptom
equally applies to the freeze and the crash. At other times the flicker
occurs and after a second or so that system becomes responsive again
(micro freeze, you might say).

Please let me know what further information would help to identify the
problem.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-core 2:1.7.6-2ubuntu7.3
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Thu Aug 19 16:45:28 2010
DkmsStatus:
 nvidia-current, 195.36.24, 2.6.32-23-generic, i686: installed 
 nvidia-current, 195.36.24, 2.6.32-24-generic, i686: installed
Lsusb:
 Bus 002 Device 003: ID 045e:00dd Microsoft Corp. 
 Bus 002 Device 002: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 004: ID 058f:6362 Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer (Internal/External)
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: System manufacturer System Product Name
ProcCmdLine: root=UUID=0b16b3df-690d-4404-afc9-9560c74fdc5a ro quiet splash noapic
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg-server
dmi.bios.date: 06/15/2006
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2N-SLI DELUXE ACPI BIOS Revision 0304
dmi.board.name: M2N-SLI DELUXE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2N-SLIDELUXEACPIBIOSRevision0304:bd06/15/2006:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N-SLIDELUXE:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       i686
 kernel:             2.6.32-24-generic

** Affects: xorg-server (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 lucid

-- 
xorg crashes randomly with seg fault
https://bugs.launchpad.net/bugs/620478
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