I have this problem with my Radeon 9600XT I had this problem on an install of Ubuntu Natty and so far the only thing I can confirm with repeatability is that 3D works when the S-video output is 'detected' and doesn't work when it isn't.
If I boot into Windows XP (dual boot) and enable the TV-Out on S-Video (even without a TV plugged in) and then reboot into Ubuntu Natty I get a 2nd screen on S-video showing up in the displays control panel and I get 3D acceleration to work. I installed a test copy of Ubuntu Oneiric onto a USB HDD and so far haven't had issues with 3D. HOWEVER: I recently did an upgrade to Oneiric inside the currently- installed Natty and the 3D issue is still present, so perhaps that is from something still there from the old installation? Again, enabling S-video in Windows and rebooting is the only sure way to make 3D work. Occasionally it will boot up and detect the S-video and enable 3D by itself but this is not often. -- 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/755791 Title: [RS690M] No 3d acceleration in Radeon X1200 with new Gallium r300 / 3d drivers in 11.04 (Needs kernel quirk) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/755791/+subscriptions _______________________________________________ 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
