Public bug reported:
I have a lenovo T440p laptop (Intel Haswell integrated graphics + nvidia
GPU, I'm not using the nvidia at all). I have a docking station with a
single 2560x1440 displayport monitor attached, and I typically use my
laptop in the docking station with the lid closed (so I have a single
2560x1440 display active).
If I suspend while docked, undock while suspended, and then resume, the
laptop screen doesn't light up. I am able to partially recover if I do
the alt-f1 to switch VTs and then do a suspend/resume cycle -- in that
case I can get the text console on the internal laptop screen. However,
switching back to the X VT turns the screen off, and no amount of
monkeying that I've tried (including fiddling with xrandr) brings X back
-- I end up needing to reboot.
It does work fine if I boot undocked, use X on the laptop screen for a
while, then suspend and dock while suspended. If I resume when docked,
switching to the displayport monitor works perfectly. Also
suspend/resume while undocked works fine. The only bad case is if I
suspend while docked and resume undocked.
This is a regression some time in the 14.10 cycle -- ~1 month ago, I
didn't have this problem, but I'm not sure which update brought the
issue in.
It is 100% reproducible for me and I'm happy to try whatever debugging
steps are helpful.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-6.11-generic 3.16.0-rc7
Uname: Linux 3.16.0-6-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.5-0ubuntu1
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: Wed Jul 30 11:02:08 2014
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
Intel Corporation 4th Gen Core Processor Integrated Graphics Controller
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:221d]
NVIDIA Corporation GK208M [GeForce GT 730M] [10de:1290] (rev a1) (prog-if 00
[VGA controller])
InstallationDate: Installed on 2014-01-11 (200 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140109)
MachineType: LENOVO 20ANCTO1WW
PlymouthDebug: Error: [Errno 13] Permission denied:
'/var/log/plymouth-debug.log'
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-6-generic.efi.signed
root=/dev/mapper/ubuntu--vg-root ro splash quiet plymouth:debug=1 vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: GLET64WW (2.18 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20ANCTO1WW
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: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGLET64WW(2.18):bd12/18/2013:svnLENOVO:pn20ANCTO1WW:pvrThinkPadT440p:rvnLENOVO:rn20ANCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20ANCTO1WW
dmi.product.version: ThinkPad T440p
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11+14.10.20140707-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.54-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.2.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.2.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu8
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.914-1~exp1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Tue Jul 29 23:16:22 2014
xserver.configfile: default
xserver.errors:
intel: Failed to load module "dri3" (module does not exist, 0)
intel: Failed to load module "present" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 1034
vendor LGD
xserver.version: 2:1.15.1-0ubuntu8
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 ubuntu utopic
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https://bugs.launchpad.net/bugs/1350479
Title:
laptop display doesn't turn on if I suspend while docked, resume after
undocking
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