Created attachment 28883 [details] test case: g++ -o test-ui test-ui.cpp `pkg-config --libs --cflags clutter-1.0` -Wall; ./test-ui With the attached sample clutter test-application I'm getting following error on the terminal I started the X server: (EE) DoSwapInterval: cx: ..., GLX screen = ... ... and the output of the application is attached, also. The problem occurs only with the radeon driver. I can not test, whether the stable radeon drivers are also affected. My system is a X86 gentoo with xorg-server, libdrm, mesa, xf86-video-ati and all the needed dependencies from the current git repositories. Kernel: 2.6.31-rc5.
Created attachment 28884 [details] "black boxes" instead of well rendered characters
Created attachment 28885 [details] Xorg.log (as you can see, I'm using radeon KMS)
I just rechecked the test case application within an openbox - non AIGLX - environment and there the text is rendered correctly. So the error seems to be origined in the mesa/3D backend I think, when it only occurs with compiz running.
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