Unofficial AMD Bugzilla – Bug 312
KDE OpenGL2 and Direct Rendering problem
Last modified: 2013-08-14 11:42:04 CDT
Description of problem:
KWin has blacklist fglrx for a long time, due to the problem.
Steps to reproduce:
1. KWIN_DIRECT_GL=1 kwin --replace (since fglrx is blacklisted)
2. enable direct rendering either opengl2 (if vsync and tear free is enabled, everything will get worse).
Window will flickr sometimes, and screen will be freeze if opengl related program start, like glxgears, for 11.10, the alt-tab in kwin may recover from this case.
Everything works well.
Catalyst support might be drop if this cannot be fixed.
We are working on the issue and will support direct render for kwin.
Please fix it. We want a good support for linux.
(In reply to comment #2)
> We are working on the issue and will support direct render for kwin.
Will there be an ETA close enough or do we still need to wait +1 year as we seen for mutter support and gnome-shell?
> Fix for flickering of OpenGL applications when using KWin direct rendering.
> First of all I want to thank Jammy Zhou for adapting our OpenGL test application to determine whether the Catalyst driver supports direct rendering with compositing. Thanks to that change KWin will default to direct rendering and OpenGL 2 on the latest Catalyst drivers (in fact KWin defaults to direct rendering on all drivers now).