Xorg fails to start on log out/switch user

[BenJ]

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

[penalvch (penalvch)]

BenJ, thank you for reporting this and helping make Ubuntu better. Saucy reached EOL on July 17, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Is this an issue in a supported release?

[Launchpad Janitor (janitor)]

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