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[Launchpad Bug Tracker <1454160@xxxxxxxxxxxxxxxxxx>]

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I have an external screen connected to my machine (T450s, via docking
station) and after resuming from suspend, my external monitor is
disabled.

After some trial and error I made an interesting observation: The
external monitor only stops working if suspend via systemctl suspend,
sudo pm-suspend, or via the hotkey on my keyboard (K750).

However, this problem does not occur if I suspend via the menu entry in
the upper right corner.

How is this even possible?

Mapping the suspend command from the upper right corner to a hotkey
would be a sufficient workaround. But which command is used by that
button?


ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.17.2-0ubuntu1
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
CurrentDesktop: Unity
Date: Tue May 12 11:10:31 2015
DistUpgraded: Fresh install
DistroCodename: vivid
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:5036]
InstallationDate: Installed on 2015-05-03 (9 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: LENOVO 20BWS03F00
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic root=/dev/mapper/vgubuntu-root ro quiet splash
SourcePackage: xorg
Symptom: display
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/10/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET47WW (1.12 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BWS03F00
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrJBET47WW(1.12):bd03/10/2015:svnLENOVO:pn20BWS03F00:pvrThinkPadT450s:rvnLENOVO:rn20BWS03F00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20BWS03F00
dmi.product.version: ThinkPad T450s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
version.ia32-libs: ia32-libs N/A
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 1:1.0.11-1ubuntu2build1
xserver.bootTime: Tue May 12 11:08:05 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.17.1-0ubuntu3

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


** Tags: amd64 apport-bug compiz-0.9 latest-bios-1.13 needs-bisect regression-release ubuntu vivid
-- 
External monitor is disabled after resume
https://bugs.launchpad.net/bugs/1454160
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