*** Hi there, I seem to have found resolution on this very frustrating bug.
I've been going on 3 days now without a single crash, and that is with trying to instigate it with all the usual things (mostly Thunderbird opening a window) Note that I have NOT used any other workarounds (like animation disabling, GDM instead of lightdb, switch to xubuntu etc) Switching to xubuntu/kubuntu/whatever was not an option for me. It resolved by proceeding to follow these steps given above by Christopher M. Penalver (penalvch) wrote on 2015-10-30: #43 (I've pasted his note below) (doing a dist-upgrade instead of just the usual upgrade seemed to do the trick): Please follow these instructions to have apport report a new bug about your crash that can be dealt with by the automatic retracer. First, execute at a terminal: cd /var/crash && sudo rm * ; sudo apt-get update && sudo apt-get -y dist-upgrade && sudo service apport start force_start=1 If you are running the Ubuntu Stable Release you might need to enable apport in /etc/default/apport and restart. Now reproduce the crash, then open a terminal, navigate to your /var/crash directory and file your report with: sudo ubuntu-bug /var/crash/_my_crash_report.crash where _my_crash_report.crash is the crash you would like to report. By default, this sends the crash to the Ubuntu Error Tracker infrastructure, which is different than Launchpad. For more on this, please see https://wiki.ubuntu.com/ErrorTracker . However, if after doing this you would still like to have a crash report posted to Launchpad, for example to ease triage and add others to your report, one would need to open the following file via a terminal: sudo nano /etc/apport/crashdb.conf and comment out the line: 'problem_types': ['Bug', 'Package'], by changing it to: # 'problem_types': ['Bug', 'Package'], Save, close, and file the crash report via: sudo ubuntu-bug /var/crash/_my_crash_report.crash If you do open this report, please feel free to subscribe me to it. However, I'm closing this report since the process outlined above will deal with this issue more efficiently. Also, please do not attach your crash report manually to this report and reopen it. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1509846 Title: lightdm crashes on window open in Ubuntu 15.10 intel Status in lightdm package in Ubuntu: Confirmed Bug description: Symptom: xorg crashes on windows creation How to reproduce: No 100% reproducibility, however intensively using 2D/3D acceleration triggers the bug (e.g. by opening several new windows and/or menus in a Unity desktop environment) Affected hardware: Intel HD Graphics 4400/5000 etc Affected software: - kernel 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 - Ubuntu 15.10 with Unity (because of compiz 2D/3D acceleration) - any other software using direct rendering (e.g. VLC) Workaround: - Disable window animations in Compiz reduces the frequency of the crashes. Use compizconfig-settings-manager for this tweak (sudo apt-get install compizconfig-settings-manager) [original description below] I get crashes, when I open a new window in an already started application. It happens irregularely, but I can force the crash if I open several new message windows in thunderbird. But it also happens in other applilcations, for example a new terminal window. This is the output during the crash in /var/log/Xorg.0.log [ 253.500] (EE) [ 253.500] (EE) Backtrace: [ 253.500] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x55f09075b62e] [ 253.500] (EE) 1: /usr/bin/X (0x55f0905a7000+0x1b8999) [0x55f09075f999] [ 253.500] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f44130a8000+0x352f0) [0x7f44130dd2f0] [ 253.500] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x24f18) [0x7f440f4a3f18] [ 253.500] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x26157) [0x7f440f4a5157] [ 253.500] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x2b4b1) [0x7f440f4aa4b1] [ 253.500] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x804e4) [0x7f440f4ff4e4] [ 253.501] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x80e2c) [0x7f440f4ffe2c] [ 253.501] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x82e1a) [0x7f440f501e1a] [ 253.501] (EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x4197c) [0x7f440f4c097c] [ 253.501] (EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x59906) [0x7f440f4d8906] [ 253.501] (EE) 11: /usr/bin/X (_CallCallbacks+0x34) [0x55f090604654] [ 253.501] (EE) 12: /usr/bin/X (WriteToClient+0x244) [0x55f09075f274] [ 253.501] (EE) 13: /usr/bin/X (WriteEventsToClient+0x1e2) [0x55f09060a502] [ 253.501] (EE) 14: /usr/bin/X (0x55f0905a7000+0xf495a) [0x55f09069b95a] [ 253.501] (EE) 15: /usr/bin/X (0x55f0905a7000+0xf5ef5) [0x55f09069cef5] [ 253.501] (EE) 16: /usr/bin/X (0x55f0905a7000+0x5818f) [0x55f0905ff18f] [ 253.501] (EE) 17: /usr/bin/X (0x55f0905a7000+0x5c34b) [0x55f09060334b] [ 253.501] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f44130c8a40] [ 253.501] (EE) 19: /usr/bin/X (_start+0x29) [0x55f0905ed6c9] [ 253.501] (EE) [ 253.501] (EE) Segmentation fault at address 0x0 [ 253.501] (EE) Fatal server error: [ 253.501] (EE) Caught signal 11 (Segmentation fault). Server aborting [ 253.501] (EE) [ 253.501] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 253.501] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 253.502] (EE) [ 253.502] (II) AIGLX: Suspending AIGLX clients for VT switch [ 253.588] (EE) Server terminated with error (1). Closing log file. --- .tmp.unity.support.test.0: ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true DistUpgraded: Fresh install DistroCodename: wily DistroRelease: Ubuntu 15.10 DistroVariant: ubuntu DkmsStatus: virtualbox, 5.0.4, 4.2.0-11-generic, x86_64: installed virtualbox, 5.0.4, 4.2.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:3978] InstallationDate: Installed on 2015-10-20 (6 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924) MachineType: LENOVO 20266 Package: xorg 1:7.7+7ubuntu4 PackageArchitecture: amd64 ProcEnviron: TERM=screen PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=a2970568-5fac-4c99-bbdf-be6778ae16d2 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 Tags: wily ubuntu compiz-0.9 UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev' Uname: Linux 4.2.0-16-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 09/17/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 76CN27WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Yoga2 dmi.board.vendor: LENOVO dmi.board.version: 31900058STD dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga 2 Pro dmi.modalias: dmi:bvnLENOVO:bvr76CN27WW:bd09/17/2013:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro: dmi.product.name: 20266 dmi.product.version: Lenovo Yoga 2 Pro dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3 xserver.bootTime: Tue Oct 27 02:25:28 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 16970 vendor SDC xserver.version: 2:1.17.2-1ubuntu9 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1509846/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
