lcd flickers after dpms cycle

[Marc Deslauriers]

After installing Oneiric beta 2 on a Acer Aspire One 522 with an AMD C-50 chipset, when the screen is shut off with dpms and comes back on, the LCD flickers. The longer the screen is turned off, the more severe the flickering is when it is turned back on. When the flickering occurs, waiting a couple of minutes makes the flicker grow progressively better until it is gone completely.

How to reproduce:
xset dpms force off; sleep 10; xset dpms force on

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,resize,compiztoolbox,move,regex,place,animation,mousepoll,imgpng,expo,gnomecompat,snap,wall,vpswitch,grid,session,ezoom,fade,workarounds,unitymtgrabhandles,scale,unityshell]
CompositorRunning: compiz
Date: Sat Sep 24 15:24:04 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus: bcmwl, 5.100.82.38+bdcom, 3.0.0-11-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 ATI Technologies Inc Device [1002:9804] (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0543]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 0402:9665 ALi Corp.
MachineType: Acer Aspire One 522
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=afbb5dd5-d2b3-4fec-b443-89246687d17d ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/08/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: JE10-BZ
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.12
dmi.modalias: dmi:bvnAcer:bvrV1.12:bd06/08/2011:svnAcer:pnAspireOne522:pvrV1.12:rvnAcer:rnJE10-BZ:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.12:
dmi.product.name: Aspire One 522
dmi.product.version: V1.12
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.5.94+bzr2803-0ubuntu5
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Cand-3 (cand-3)]

Created attachment 50058
lspci -vvnn

My E-350 laptop screen flickers for ~5 minutes every time after waking from DPMS. The flicker persists through VT switches and changing the power profile to high.

After the wait it stabilizes and picture is good again.

It looks similar to a CRT on 60Hz, but xrandr is confident the mode is right for the lcd (60hz, not something lower).

Lenovo G575 laptop
AMD E-350
Linux 3.0.1

[Cand-3 (cand-3)]

Created attachment 50060
dmesg

[Cand-3 (cand-3)]

Now that I tried to make it happen manually (sleep 1 && xset dpms force off), it didn't show itself; though for the last few days, it's always happened after X's 10-minute delay DPMS.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Simon Strandman (nejsimon)]

I have this problem too on similar E350-based hardware.

Sometimes I get this flicker, sometimes the screen is garbled (bug #36513). When I get a garbled screen the flicker usually persists even after a reboot. (Though this never happens in windows so I don't think it's a hardware issue.)

[Marc Deslauriers (mdeslaur)]

I am getting this on a C-50 based Acer Aspire One 522.
I can reliably reproduce the issue with:

xset dpms force off; sleep 10; xset dpms force on

[Marc Deslauriers (mdeslaur)]

FYI, I've installed Natty, and it has the same issue, so it's not a regression.

[Bryce Harrington (bryce)]

Hey mdeslaur,

Hi, thanks for reporting this issue during the development period of
Ubuntu.

I notice there's not been further comments to the bug report since the
release came out, would you mind updating us on the status of it in the
release?

Are you still able to reproduce the issue? If not, do you think the bug
report can be closed, or do you think we should continue tracking it?

[Marc Deslauriers (mdeslaur)]

I can still reproduce this with Oneiric and all -proposed updates installed as of today. Please don't close this issue. Thanks.

[Marc Deslauriers (mdeslaur)]

I can't reproduce this anymore with current Precise. Closing.

[Martin-peres-n (martin-peres-n)]

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/208.