I'm also suffering under this issues. My hw is i945GM in sony vaio sz1xp, distribution is ubuntu interpid with Jaunty xorg-edgers ppa packages. I always compile my own kernel which exactly suits my hw, and have tux on ice support.
When I'm on 2.6.28 kernel, I'm able to enable GEM via UXA option in xorg.conf. Performance is very low compared to standard libs and drivers coming with stock Intepid (300 FPS to ~1200FPS in glxgears) and beryl is very unresponsive. Intel xorg driver is compiled against latest ppa source package too, and is 2.5.99.1 version. X server is stock Interpid version 1.5.3. With latest package update (yesterday) from xorg-edgers ppa is it even worse only ~50 FPS. Today I'm switched back to 2.6.27 kernel, with no package change. Glxgears performance is same about 50FPS but beryl runs perfectly smooth. Glxinfo says: Failed to initialize GEM. Falling back to classic. ... OpenGL renderer string: Mesa DRI Intel(R) 945GM 20080716 x86/MMX/SSE2 OpenGL version string: 1.4 Mesa 7.3-rc1 ... which is OK on 2.6.27 kernel. With 2.6.28 is there GEM version of DRI exposed. Is there anybody who haven't this issues? -- [i945] 2.5.1 driver poor performance https://bugs.launchpad.net/bugs/303011 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
