Main monitor doesn't wake up after system suspend
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xorg (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
If I lock my Unity session (Super+L) and power down my two monitors using external power switch, when after a few minutes I restore the power to monitors and wake up Ubuntu only my VGA connected LG display wakes up. My main monitor - a DisplayPort connected Dell U2410 wakes up only for a brief moment (it's power led goes blue from yellow) but before any picture would be displayed it goes back to sleep mode (led goes yellow again).
All of this is true only for X session. If I switch to tty1 (Ctrl+Alt+F1) the Dell wakes up correctly and shows tty1. Going back to X (Ctrl+Alt+F7) causes this monitor to go to power save mode again.
The only means for me to get my main display back in X is to restart the computer, as logging in and out of X doesn't help. I have also tried running Displays configuration tool while in X, but what it only does is that once I click "Detect Displays" button Dell's power led goes blue for a brief moment and then immediately back to yellow (power save mode).
I haven't encountered such behavior with Ubuntu 14.04, nor have I experienced right after migrating to 16.04. I believe this regression showed up with some update within the last two weeks.
Both monitors are hooked up to AMD Radeon 5850 graphics card.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSign
Uname: Linux 4.4.0-22-generic x86_64
.tmp.unity_
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
BootLog:
Scanning for Btrfs filesystems
Ubuntu_Root: clean, 690241/3670016 files, 6292028/14652416 blocks
CompizPlugins: No value set for `/apps/
CompositorRunning: compiz
CompositorUnred
CompositorUnred
CurrentDesktop: Unity
Date: Sat May 21 21:22:43 2016
DistUpgraded: 2016-04-23 22:19:53,020 ERROR got error from PostInstallScript ./xorg_
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 5.0.18, 4.4.0-21-generic, x86_64: installed
virtualbox, 5.0.18, 4.4.0-22-generic, x86_64: installed
ExtraDebuggingI
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Cypress PRO [Radeon HD 5850] [1002:6899] (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Cypress PRO [Radeon HD 5850] [1002:0b00]
InstallationDate: Installed on 2015-08-22 (272 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7583
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to xenial on 2016-04-23 (27 days ago)
dmi.bios.date: 08/18/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.11
dmi.board.
dmi.board.name: P55-GD65 (MS-7583)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: MS-7583
dmi.product.
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
version.compiz: compiz 1:0.9.12.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.
version.
version.
version.
version.
version.
version.
version.
xserver.bootTime: Sat May 21 20:49:42 2016
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.3-1ubuntu2
xserver.
Status changed to 'Confirmed' because the bug affects multiple users.