ubuntu-x-swat team mailing list archive

[Florian Achleitner <fachleitner@xxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-ati

I use two monitor connected via DVI. After suspend to ram and resume,
the picture on only one display gets scrambled and unusable.

Some Facts:
- Everthing runs as expected, but the left display show a picture looking like every fourth pixel is displayed, and the ones in between have the values of their neighbor. The picture is updated and flickerfree. I can attach a foto if it helps..

- Taking a screenshot gives a normal picture.

- Disabling KMS by passing radeon.modeset=0 to the kernel solves the
problem. I attach 2 dmesg outputs of the resume sequence. Note that with
modeset=0 "[drm] Resetting GPU" is output, while with KMS it is not.

- It occurs only if using the 2 monitors in "big desktop" mode.

- logging out an back in solves it

- fglrx (i used it until lucid) had the same issue. It was silently
fixed around version 10.2.

- Hibernation doesn't work too. It ends up in gdm after resuming. Maybe
X crashes, but thats another story.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-video-ati 1:6.13.0-1ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
Architecture: amd64
Date: Fri May 21 09:40:46 2010
DkmsStatus:
 
MachineType: Dell Inc. Dell XPS420
ProcCmdLine: root=/dev/mapper/lvm_vg-root ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: xserver-xorg-video-ati
dmi.bios.date: 06/23/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0TP406
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd06/23/2008:svnDellInc.:pnDellXPS420:pvr:rvnDellInc.:rn0TP406:rvrA01:cvnDellInc.:ct7:cvr:
dmi.product.name: Dell XPS420
dmi.sys.vendor: Dell Inc.
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       x86_64
 kernel:             2.6.32-22-generic

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dual-display radeon resume

-- 
Resume with two displays gives scrambled pixels on only one display
https://bugs.launchpad.net/bugs/583676
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