Bug 14412 - [855GM]Regression in (after commit 103dc34f3afc17cea7e086927e124a30c605a686)
Summary: [855GM]Regression in (after commit 103dc34f3afc17cea7e086927e124a30c...
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Gordon Jin
QA Contact: Xorg Project Team
Keywords: NEEDINFO
Depends on:
Reported: 2008-02-07 10:16 UTC by Timo Aaltonen
Modified: 2008-02-19 14:28 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

diff between the known to be working version and HEAD (17.58 KB, patch)
2008-02-08 10:18 UTC, Timo Aaltonen
no flags Details | Splinter Review

Description Timo Aaltonen 2008-02-07 10:16:06 UTC
There's a regression in the release candidate on i855GM. Ubuntu Hardy had a snapshot of the stable tree up to commit 103dc34f3afc17cea7e086927e124a30c605a686 (despite the package version number). That worked fine. There are two separate bugreports on launchpad:


"After upgrading to this morning and restarting X, I noticed that pixmaps had a strange appearance - as though they were being rendered on a 16bit display (which xdpyinfo suggested wasn't the case).
For example, the green gear in glxgears appeared to be composed of alternating light and dark green pixels, instead of a solid area of the same tone.
Installing the previous 2.2.0+git20080107 version brings correct behaviour back."


"After upgrading from 2.2.0+git20080107-1ubuntu2 to current version (, strange artifacts (random red dots, random red lines and red curves made of red dots) started to appear on screen.
Downgrading back to 2.2.0+git20080107-1ubuntu2 fixed this.

Using an i852/855GM notebook (Asus A3L)"

reverting commit a70b59bd44d14e77c9e522dbe225b62a8bcf3050 apparently didn't help.
Comment 1 Timo Aaltonen 2008-02-08 10:18:33 UTC
Created attachment 14217 [details] [review]
diff between the known to be working version and HEAD
Comment 2 Wang Zhenyu 2008-02-11 08:03:31 UTC
The diff looks mixed with multiple commits, could you bisect which commit caused regressions?

How about disable frame buffer compression?
Comment 3 Wang Zhenyu 2008-02-18 17:01:42 UTC
How about current master?
Comment 4 Timo Aaltonen 2008-02-19 14:28:41 UTC
Yep, the latest commit on the stable branch fixed it. Thanks!

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