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[Launchpad Bug Tracker <1454237@xxxxxxxxxxxxxxxxxx>]

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After upgrading my Thinkpad T520 laptop to Ubuntu 15.04, the X server
gives a blank black screen (but backlight is still on).  I can switch to
other virtual consoles (ctrl-alt-F1, etc) and log in, so the rest of the
system is running just fine.  The blank screen shows up regardless of
how X is started -- via lightdm, using startx, or even running X
explicitly.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.1
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Tue May 12 08:36:01 2015
DistUpgraded: 2014-05-05 12:15:21,112 DEBUG failed to SystemUnLock() (E:Not locked)
DistroCodename: vivid
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21cf]
MachineType: LENOVO 4239CTO
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=8baf8860-cc1b-434f-9406-d4c302883a6a ro rootfstype=ext4 text
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to vivid on 2014-05-05 (371 days ago)
dmi.bios.date: 11/24/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8AET55WW (1.35 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4239CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8AET55WW(1.35):bd11/24/2011:svnLENOVO:pn4239CTO:pvrThinkPadT520:rvnLENOVO:rn4239CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4239CTO
dmi.product.version: ThinkPad T520
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.60-2
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Tue May 12 08:30:37 2015
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 
xserver.version: 2:1.17.1-0ubuntu3

** Affects: xorg (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug bios-outdated-1.45 ubuntu vivid
-- 
Thinkpad T520 / i915 blank X display in 15.04
https://bugs.launchpad.net/bugs/1454237
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