After some trial and error it seems like I have to rephrase the initial
bug report:
If I resume from suspend caused by systemctl suspend, sudo pm-suspend,
or via the hotkey on my keyboard (K750), the login screen is only shown
on the build-in screen and not on the external monitor. In this case the
external monitor remains off and has to be enabled again by pressing
super+p multiple times.
However, if I resume from suspend caused be the suspend entry in the
menu accessible from the upper right corner (hereafter referred to as
'menu suspend'), the login screen is shown on both screens (build-in and
external). In this case the external monitor works as intended, even
after logging in.
If automatic login is enabled, the login screen is never shown after
resuming (obviously) and both monitors do work as intended. However,
enabling automatic login is not a sufficient work around.
I wasn't able to reproduce this observation on an live CD system (tried
14.04, 14.10, 15.04) since those systems always behaved weird after
another user with password was added.
So, how does 'menu suspend' differ from the other ways mentioned to
suspend the system?
** Changed in: xorg (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1454160
Title:
External monitor is disabled after resume
Status in xorg package in Ubuntu:
New
Bug description:
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
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