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[Launchpad Bug Tracker <1322644@xxxxxxxxxxxxxxxxxx>]

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The problem started after I upgraded from kubuntu 13.10 to 14.04.
the monitor is connected to my laptop via a VGA mini display port.
At boot, it works correctly, but if the screen goes blank after some inactivity, then it stays black forever.

WORKAROUND: If I unplug the VGA adapter, and plug it back, it works
again.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: kwin
CurrentDesktop: KDE
Date: Fri May 23 16:02:09 2014
DistUpgraded: 2014-05-09 13:04:30,209 DEBUG enabling apt cron job
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-sputnik-20120802-0
DistroCodename: trusty
DistroVariant: kubuntu
DkmsStatus:
 fwts-efi-runtime-dkms, 14.03.01, 3.11.0-20-generic, x86_64: installed
 fwts-efi-runtime-dkms, 14.03.01, 3.13.0-24-generic, x86_64: installed
 vboxhost, 4.3.6, 3.11.0-20-generic, x86_64: installed
 vboxhost, 4.3.6, 3.13.0-24-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:052e]
InstallationDate: Installed on 2012-11-13 (555 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Failed to find casper uuid.conf in 'binary/casper/initrd.img' LIVE/INSTALL Binary 20120802-21:13
LightdmGreeterLog:
 QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Aucun fichier ou dossier de ce type
 QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus
 Bus::open: Can not get ibus-daemon's address.
 IBusInputContext::createInputContext: no connection to ibus-daemon
LightdmGreeterLogOld:
 QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Aucun fichier ou dossier de ce type
 QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus
 Bus::open: Can not get ibus-daemon's address.
 IBusInputContext::createInputContext: no connection to ibus-daemon
MachineType: Dell Inc. Dell System XPS L321X
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=f18a56b7-1429-4ce3-b6e3-65edacff16a3 ro quiet splash crashkernel=384M-:128M vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to trusty on 2014-05-09 (14 days ago)
dmi.bios.date: 07/02/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 085X6F
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd07/02/2012:svnDellInc.:pnDellSystemXPSL321X:pvr:rvnDellInc.:rn085X6F:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L321X
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Fri May 23 06:57:33 2014
xserver.configfile: None
xserver.errors: Failed to load module "displaylink" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                4920
 vendor                                     CMN
xserver.version: 2:1.15.1-0ubuntu2

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug kubuntu latest-bios-a08 regression-release trusty
-- 
[Dell XPS 13 (L321X)] External monitor does not wake up after sleep
https://bugs.launchpad.net/bugs/1322644
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