Public bug reported: I've created a diff between the failed attempts and the successful initializations of Xorg.
This happens frequently, necessitating logging into the console and "sudo service restart lightdm" to attempt to fix it. Five times out of Eight (5/8) it will not work. Eventually, Xorg can be started with enough invocations of the above command. It is interesting to note the difference happens to be the loader magic and the behavior of " (II) evdev: Acer WMI hotkeys: Close" The times have been stripped from the logs, but can be provided on request. This appeared after the recent Ubuntu release. Laptop is an Acer 5745g-zr7a, with Intel video built in and an Optimus enabled Nvidia card (accessed via Bumblebee). Difference: https://gist.github.com/benjolitz/b6374b483bfa96ccfa01 Successful Start: https://gist.github.com/benjolitz/68760e9c3a071b17f580 Failed: https://gist.github.com/benjolitz/7ee9efd6ec36a60452d0 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xorg 1:7.7+1ubuntu6 ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5 Uname: Linux 3.11.0-19-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: kwin Date: Sun May 18 14:40:35 2014 DistUpgraded: 2014-03-09 23:42:11,075 DEBUG enabling apt cron job DistroCodename: saucy DistroVariant: kubuntu ExtraDebuggingInterest: No GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 18) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:035b] NVIDIA Corporation GF108M [GeForce GT 420M] [10de:0df1] (rev ff) (prog-if ff) InstallationDate: Installed on 2013-05-27 (356 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Acer Aspire 5745G MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.11.0-19-generic root=UUID=dfc56055-5855-44e7-a18d-03921098b480 ro rootflags=subvol=@ acpi_osi=Linux quiet splash i915.i915_enable_rc6=0 SourcePackage: xorg UpgradeStatus: Upgraded to saucy on 2014-03-10 (69 days ago) dmi.bios.date: 22/03/2011 dmi.bios.vendor: INSYDE dmi.bios.version: V1.19 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JV51_CP dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnINSYDE:bvrV1.19:bd22/03/2011:svnAcer:pnAspire5745G:pvrV1.19:rvnAcer:rnJV51_CP:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire 5745G dmi.product.version: V1.19 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.49+git20131202.c3d96897-0ubuntu0sarvatt~raring version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Sun May 18 14:27:32 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 16620 vendor AUO xserver.version: 2:1.14.5-1ubuntu2~saucy1 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug kubuntu possible-manual-nvidia-install saucy third-party-packages -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1320705 Title: Xorg fails to start on log out/switch user To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1320705/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
