I am also experiencing this bug in 11.04 on my Dell Inspiron 9300 (ATI Radeon mobility X300, M22) using the open source ATI drivers. The bug only affects the repainting of the background in the main (ie. laptop) display - active windows within the screen redraw themselves fine when overlapped and then un-overlapped. The external monitor behaves properly.
It may be unconnected, but since upgrading to 11.04 when I try to run Tux Racer (etracer) from a term, to test my graphics rendering speed, if fails to run with error message: "*** etracer error: Couldn't initialize video: Couldn't find matching GLX visual (Resource temporarily unavailable)" The Unity support test output is as follows:- ~$ /usr/lib/nux/unity_support_test -p OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RV370 OpenGL version string: 2.1 Mesa 7.10.2 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity supported: yes -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/576288 Title: second screen in dualhead setup doesn't refresh properly until reconfigured _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
