lcd flickers after dpms cycle
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-driver-ati |
Unknown
|
Low
|
|||
xserver-xorg-video-ati (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
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-
ProcVersionSign
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelMo
.tmp.unity.
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,
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
ExtraDebuggingI
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=
SourcePackage: xserver-
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.
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.
dmi.modalias: dmi:bvnAcer:
dmi.product.name: Aspire One 522
dmi.product.
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.5.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.
version.
version.
version.
version.
version.
version.
version.
tags: | added: flicker |
Changed in xserver-xorg-driver-ati: | |
importance: | Unknown → Low |
status: | Unknown → Confirmed |
Changed in xserver-xorg-driver-ati: | |
status: | Confirmed → Unknown |
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