Bug 321504 - kwin incorrectly determines compositing type resulting in a black screen with a cursor
Summary: kwin incorrectly determines compositing type resulting in a black screen with...
Status: RESOLVED DUPLICATE of bug 321217
Alias: None
Product: kwin
Classification: Plasma
Component: compositing (show other bugs)
Version: 4.10.80
Platform: Ubuntu Linux
: NOR grave
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-06-22 19:26 UTC by Olivier van der Toorn
Modified: 2013-06-22 19:50 UTC (History)
0 users

See Also:
Latest Commit:
Version Fixed In:

Attachments
Output of qdbus org.kde.kwin /KWin supportInformation (3.72 KB, text/plain)
2013-06-22 19:43 UTC, Olivier van der Toorn 		Details
Output of glxinfo -l (12.62 KB, text/plain)
2013-06-22 19:44 UTC, Olivier van der Toorn 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Olivier van der Toorn 2013-06-22 19:26:20 UTC 
I updated to KDE SC 4.10.80 on Kubuntu Raring (13.04) today, after rebooting and logging in I was greeted by a black screen with only a cursor showing. After a bit of digging around I found that if I changed the compositor type from OpenGL2 to XRender and rebooted I could login like normal again. Afterwards trying to enable OpenGL2 again throws a message that OpenGL2 is not supported on this system. I think the fallback to XRender failed somewhere.

Reproducible: Didn't try




The system I'm using is a HP Compaq 6730s: http://www.hp.com/hpinfo/newsroom/press_kits/2008/connecting/ds_bn_6730s.pdf

It uses an Intel Integrated graphics chip.
Comment 1 Thomas Lübking 2013-06-22 19:29:22 UTC 
Please attach the output of "qdbus org.kde.kwin /KWin supportInformation" and "glxinfo -l"
Comment 2 Olivier van der Toorn 2013-06-22 19:43:18 UTC 
Created attachment 80718 [details]
Output of qdbus org.kde.kwin /KWin supportInformation
Comment 3 Olivier van der Toorn 2013-06-22 19:44:00 UTC 
Created attachment 80719 [details]
Output of glxinfo -l
Comment 4 Thomas Lübking 2013-06-22 19:50:04 UTC 
Disable color correction, it's what causes the black screen.
Nevertheless, on that chip the fixed function path (GL 1.3) or GLES (kwin_gles) will probably get you better performance on eg. blurring.

*** This bug has been marked as a duplicate of bug 321217 ***