Bug 18400

Summary: Occasional tiny window decoration corruption [EXA enabled, Compiz]
Product: xorg Reporter: Bryce Harrington <bryce>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: minor    
Priority: medium CC: oyvind
Version: 7.4 (2008.09)   
Hardware: x86 (IA32)   
OS: Linux (All)   
URL: https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/291055
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Xorg.0.log none

Description Bryce Harrington 2008-11-05 14:39:35 UTC 
Created attachment 20092 [details]
Xorg.0.log

Forwarding this EXA bug from a Ubuntu tester:
https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/291055

[Problem]
Infrequent window decoration corruption under Compiz with EXA.

[Original Report]
I observe occasional corruption of window decorations. It is quite rare, though. It manifests itself as a tiny, horizontal, white line of garbage in the upper right corner of the affected window (on the decoration/frame, across the transparent shadow).

The window decorator is the standard gtk-window-decorator that comes with Compiz on Ubuntu, with decorator setup at defaults and standard Human theme. I have no screenshot of this at the moment, because I am not sure how to reproduce it, but it does happen. I will attach a screenshot to this bug as soon as I see the problem.

Xorg driver in use is xserver-xorg-video-radeon git20081003.f9826a56-0ubuntu2.
EXA-acceleration is enabled.
Ubuntu 8.10 (fully updated, installed from RC).
Compiz is enabled.
Human window decoration theme.
Graphics card: ATI X1400 mobile radeon (R500), 128MB RAM.

If more information is needed, please say so. I am also willing and able to test new GIT-snapshots of the radeon driver, and provide feedback if problems are fixed, etc.

[Screenshot showing corruption]
http://launchpadlibrarian.net/19122875/tiny-windeco-corruption-compiz-radeon.png

[lspci]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility X1400 [1002:7145]
	Subsystem: Lenovo Device [17aa:202a]
(See http://launchpadlibrarian.net/19073523/lspci-vvnn.txt for full output)
Comment 1 Alex Deucher 2008-11-05 16:52:40 UTC 
does:
Option "AccelDFS" "False"
or
Option "RenderAccel" "False"
help?
Comment 2 Øyvind Stegard 2008-11-17 00:39:32 UTC 
(In reply to comment #1)
> does:
> Option "AccelDFS" "False"
> or
> Option "RenderAccel" "False"
> help?
> 

I sincerely do not know :).. 

But seriously, I can try reproducing this one, but it's really hard, as it happens only very rarely. I have some vague memory that it has happened when stressing Compiz by opening lots and lots of windows. I might try that later. When I find some reliable way of reproducing, I can try the acceleration-options and see if disabling any of them helps.
Comment 3 Alex Deucher 2009-11-11 10:36:01 UTC 

*** This bug has been marked as a duplicate of bug 18397 ***

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