Ubuntu
xorg-server package

Xorg segfault - xdiagnose output

Bug #944626 reported by Mark S
26
This bug affects 3 people
Affects Status Importance Assigned to Milestone
xorg-server (Ubuntu)
Expired
High
Unassigned

Bug Description

As requested in Bug #937706 I have run xdiagnose and this is the output.

Regards,

Mark

Backtrace:
[ 2993.960] 0: /usr/bin/X (xorg_backtrace+0x37) [0x80a66f7]
[ 2993.960] 1: /usr/bin/X (0x8048000+0x62b3a) [0x80aab3a]
[ 2993.960] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb788640c]
[ 2993.960] 3: /usr/lib/xorg/modules/extensions/librecord.so (0xb7873000+0x212f) [0xb787512f]
[ 2993.960] 4: /usr/bin/X (_CallCallbacks+0x3c) [0x80769ec]
[ 2993.960] 5: /usr/bin/X (WriteToClient+0x273) [0x80a95a3]
[ 2993.960] 6: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x70) [0xb73b0d70]
[ 2993.960] 7: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x73) [0xb73af003]
[ 2993.960] 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb7341000+0x2453b) [0xb736553b]
[ 2993.960] 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb7341000+0x9233) [0xb734a233]
[ 2993.960] 10: /usr/lib/i386-linux-gnu/libdrm.so.2 (drmHandleEvent+0xce) [0xb73989ee]
[ 2993.960] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb7341000+0x9297) [0xb734a297]
[ 2993.960] 12: /usr/bin/X (WakeupHandler+0x53) [0x8076243]
[ 2993.960] 13: /usr/bin/X (WaitForSomething+0x1a5) [0x80a3fa5]
[ 2993.960] 14: /usr/bin/X (0x8048000+0x29ed2) [0x8071ed2]
[ 2993.960] 15: /usr/bin/X (0x8048000+0x1c70c) [0x806470c]
[ 2993.960] 16: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0xb754a113]
[ 2993.960] 17: /usr/bin/X (0x8048000+0x1ca21) [0x8064a21]
[ 2993.960] Segmentation fault at address 0xb5696008
[ 2993.960]
Caught signal 11 (Segmentation fault). Server aborting

ProblemType: BugDistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7.1
ProcVersionSignature: Ubuntu 3.0.0-16.28-generic-pae 3.0.17
Uname: Linux 3.0.0-16-generic-pae i686
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu4
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,compiztoolbox,move,wobbly,cube,gnomecompat,resize,place,session,regex,rotate,unityshell]
CompositorRunning: compiz
Date: Fri Mar 2 08:11:13 2012
DistUpgraded: Fresh installDistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.1.8, 3.0.0-14-generic-pae, i686: installed
 vboxhost, 4.1.8, 3.0.0-15-generic, i686: installed
 vboxhost, 4.1.8, 3.0.0-15-generic-pae, i686: installed
 vboxhost, 4.1.8, 3.0.0-16-generic, i686: installed
 vboxhost, 4.1.8, 3.0.0-16-generic-pae, i686: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Foxconn International, Inc. Device [105b:0d83]InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: Advent DT1404
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic-pae root=UUID=a0f84e92-fdb0-45b3-a888-0cdbe6b97ef2 ro quiet splash vt.handoff=7SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/22/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: B63D3P04
dmi.board.name: H61MXL/H61MXL-K
dmi.board.vendor: Foxconn
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrB63D3P04:bd09/22/2011:svnAdvent:pnDT1404:pvrTobefilledbyO.E.M.:rvnFoxconn:rnH61MXL/H61MXL-K:rvr:
dmi.product.name: DT1404
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Advent
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6.1
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

See original description
Revision history for this message
Mark S (zarg-) wrote :
Fabio Marconi (fabiomarconi)
Changed in xorg (Ubuntu):
status: New → Confirmed
description: updated
summary: - Ubuntu “xorg-server” Bug #937706 - xdiagnose output
+ Xorg segfault - xdiagnose output
Revision history for this message
Mark S (zarg-) wrote :

Hi Fabio,

I had yet another crash again today. Should I run xdiagnose again?

Regards,

Mark

Revision history for this message
Mark S (zarg-) wrote :

I have had several more crashes today and yesterday. Do I need to post more info?
Ubuntu is getting almost unusable now. Can anyone please give me some advice?

Revision history for this message
Maarten Kossen (mpkossen) wrote :

I'm getting this more often as well and it's about one of the most annoying bugs I have *ever* experienced.

Here's my backtrace:

Backtrace:
[ 12549.977] 0: /usr/bin/X (xorg_backtrace+0x26) [0x7f18af4362f6]
[ 12549.977] 1: /usr/bin/X (0x7f18af2ae000+0x18c19a) [0x7f18af43a19a]
[ 12549.977] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f18ae5d4000+0xfcb0) [0x7f18ae5e3cb0]
[ 12549.977] 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7f18ad44a000+0x14c321) [0x7f18ad596321]
[ 12549.977] 4: /usr/bin/X (WriteToClient+0x202) [0x7f18af4398e2]
[ 12549.977] 5: /usr/bin/X (WriteEventsToClient+0x24a) [0x7f18af30638a]
[ 12549.977] 6: /usr/bin/X (TryClientEvents+0x106) [0x7f18af3064f6]
[ 12549.977] 7: /usr/bin/X (0x7f18af2ae000+0x5bd12) [0x7f18af309d12]
[ 12549.977] 8: /usr/bin/X (DeliverEventsToWindow+0x1cb) [0x7f18af309f4b]
[ 12549.977] 9: /usr/bin/X (DeliverEvents+0x133) [0x7f18af30ae93]
[ 12549.977] 10: /usr/bin/X (DeleteWindow+0x20b) [0x7f18af32884b]
[ 12549.977] 11: /usr/bin/X (0x7f18af2ae000+0x6f302) [0x7f18af31d302]
[ 12549.978] 12: /usr/bin/X (FreeClientResources+0x6a) [0x7f18af31e03a]
[ 12549.978] 13: /usr/bin/X (CloseDownClient+0x5a) [0x7f18af2fbbaa]
[ 12549.978] 14: /usr/bin/X (0x7f18af2ae000+0x4e736) [0x7f18af2fc736]
[ 12549.978] 15: /usr/bin/X (0x7f18af2ae000+0x3d64a) [0x7f18af2eb64a]
[ 12549.978] 16: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f18ad46b76d]
[ 12549.978] 17: /usr/bin/X (0x7f18af2ae000+0x3d93d) [0x7f18af2eb93d]
[ 12549.978] Segmentation fault at address 0xffffffffb09485b0
[ 12549.978]
Caught signal 11 (Segmentation fault). Server aborting

Revision history for this message
Mark S (zarg-) wrote :

Forgive me if this is stupid (I can't help that, I'm afraid) and at the risk of tempting fate...
I haven't had a crash in a couple of days. Only two things have changed since the last crash: firstly I disabled the Flash plugin in Firefox, and secondly the wireless chip on my motherboard seems to have died so I've been using a wired connection for the past couple of days.
Is it possible that either might have had a bearing on the crashes?

Revision history for this message
Bryce Harrington (bryce) wrote :

Well let's give it another week and see if you get another crash.

This backtrace doesn't reveal too much. Maybe a full backtrace would show more info. If the crashes start happening again see http://wiki.ubuntu.com/X/Backtracing for guidance in collecting one. (Ignore the directions about apport, and skip down to the procedure using gdb.)

affects: xorg (Ubuntu) → xorg-server (Ubuntu)
Changed in xorg-server (Ubuntu):
importance: Undecided → High
status: Confirmed → Incomplete
Revision history for this message
Mark S (zarg-) wrote :

Thanks Bryce. Yes I have regularly been having more crashes.

After a period of a few days without a crash, a couple of days ago I uninstalled xul-ext-ubufox and almost immediately got a crash but I have no idea if it's related. I re-installed xul-ext-ubufox in case that was it, but I got another crash yesterday.

A while ago I uninstalled sendmail via synaptic. But when I had a crash yesterday afternoon, for a fleeting moment I saw the black screen just before the Ubuntu login screen appeared, and I saw the words sendmail and error. This surprised me so I searched my disk for sendmail and found a lot of files. There's a script called sendmail in etc/cron.daily and another in etc/init.d and also some files with names like K19sendmail in etc/rc0.d and etc/rc1.d and so on. Is it safe to delete all these? Or would that break Ubuntu in any way?

Revision history for this message
Mark S (zarg-) wrote :

Bryce - I've had several more crashes. They're happening on a daily basis - sometimes two or three times a day. I'm thinking about giving up on Ubuntu and trying something else. I read the link you posted, but there's a problem: in the gdb instructions it states, "Now do what you need to make the X server crash" but as these crashes are so random I cannot do that. Unless I'm reading things wrongly?

Also, /etc/X11/core does not exist - would the core dump be somewhere else? How do I find the core dump? - and there is nothing in var/crash after these crashes.

I'd really appreciate some help with understanding the instructions where it states "Another problem can be that the default maximum size of core files has been set to 0". Can I tell if it has been set to zero?

Revision history for this message
Mark S (zarg-) wrote :

I'm still getting crashes - three this morning shortly after logging on. The only app open was Firefox, and this crashed as it was loading, taking X with it. This also happened yesterday. After logging in three times, the crashes stopped. Weird.

I'd appreciate any advice as per #8.

Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

Changed in xorg-server (Ubuntu):
status: Incomplete → Expired
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