Bug 80069 - rendering problems: black areas in KDE desktop. [mesa 10.2.1 (not with 10.1.4)]
Summary: rendering problems: black areas in KDE desktop. [mesa 10.2.1 (not with 10.1.4)]
Alias: None
Product: Mesa
Classification: Unclassified
Component: Mesa core (show other bugs)
Version: 10.2
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: mesa-dev
QA Contact:
Depends on:
Reported: 2014-06-15 22:47 UTC by CarlEitsger
Modified: 2016-07-09 00:10 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

screenshot: a program window with black areas (352.45 KB, image/png)
2014-06-15 22:49 UTC, CarlEitsger
screenshot: more black areas. Green is edited out for privacy reasons (364.14 KB, image/png)
2014-06-15 22:50 UTC, CarlEitsger

Description CarlEitsger 2014-06-15 22:47:15 UTC
Since I updated mesa-related packages (Arch Linux) some days ago I had a black screen (with mouse cursor) after login (via KDM) into KDE. I use a Intel 855GM graphics (driver: SNA compiled from 2.99.911-114-g94e3932 OR xf86-video-intel 2.99.912).

Some of my observations with KDE 4.13.2:

* black screen (after login with KDM) or parts/areas - see attached screenshots. Mouse cursor is always correct.
* alt+f2 (krunner) brings the desktop content back but only until a program is started (then parts get black again)
* Starting programs partly removes black areas. E.g. Ctrl+Esc brings up the process viewer, but only with partly non-black window decoration.
* the log-off menu does not appear (only the screen dims as expected) after right clicking the desktop → log-off.
* it only happens with active "desktop effects" (transparency, shadows, ...). Switching those off in KDE instantanously removes the rendering problem.

No issues observed in Openbox or TWM (well, those have no tranparency and so on).

Workaround - Downgrade those packages:

>   [2014-06-11 02:57] [PACMAN] downgraded mesa (10.2.1-1 -> 10.1.4-1)
>   [2014-06-11 02:57] [PACMAN] downgraded mesa-libgl (10.2.1-1 -> 10.1.4-1)
>   [2014-06-11 02:57] [PACMAN] downgraded intel-dri (10.2.1-1 -> 10.1.4-1)

A previous discussion / report was at [KDE desktop black after upgrade of mesa and intel-dri](https://bbs.archlinux.org/viewtopic.php?id=182699).

I know of [X segfault after Mesa upgrade](https://bugs.archlinux.org/task/40781?project=1&cat[0]=2&string=mesa) but I guess I see something different since I have no segfaults.

I could run a version from git or do a bisect if this is needed. In this case: mention the git source.
Comment 1 CarlEitsger 2014-06-15 22:49:27 UTC
Created attachment 101125 [details]
screenshot: a program window with black areas
Comment 2 CarlEitsger 2014-06-15 22:50:42 UTC
Created attachment 101127 [details]
screenshot: more black areas. Green is edited out for privacy reasons
Comment 3 luigi 2014-06-17 10:59:45 UTC
hi.i have similar but harmless here.

i see a black screen with movable cursor about 10-15 seconds before kde desktop.

its make a retard to meet kde.

mesa:10.2.1   kde:4.13.2  system: archlinux-64

device: 8086:0166 (ivybridge GT2 mobil)

Note:i have no idea that the issue mesa related or kde related

Comment 4 Kenneth Graunke 2014-06-17 23:06:25 UTC
(In reply to comment #3)
> hi.i have similar but harmless here.

@luigi: Ivybridge is a totally different GPU than 855GM.  Please file a separate bug.
Comment 5 CarlEitsger 2014-06-30 14:34:13 UTC
With the new mesa version the problem seems to not appear any more:

* mesa 10.2.2-1
* mesa-libgl 10.2.2-1
* intel-dri 10.2.2-1

and (same as before) xf86-video-intel 2.99.912-1.

Thank you, devs!

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