I got an ATI x1400 mobility radeon as well, using a ThinkPad T60. (german bug dscription here: http://forum.ubuntuusers.de/post/2472883/ )
1. the overall GPU performance is worse on lucid, then on karmic - on both kernels so far. for example, I get 40 fps less in quake live, and 50 fps less in openarena, when comparing performance under karmic, with performance under lucid (using exactly the same hardware and settings, of course). 2. often, the colors go wild. and parts of the screen flicker in pink and green - 3d applications definitely cause this, but it also happens seemingly at random when only using office programs. failed attempts to solve this: - disabling KMS didn't help - the radeonHD driver didn't do any good - I waited for a kernal update (2.6.32-22) - the proprietary driver from ATI ( http://support.amd.com/us/gpudownload/linux/legacy/Pages/radeon_linux.aspx?type=2.4.2&product=2.4.2.3.9&lang=us&rev=9.3&ostype=Linux%20x86 ) does not support the X.Org 7.5 of lucid, because support was dropped from ATI since X.Org 7.4. --> so by now I simply installed karmic again, everything works fine there (with the normal radeon driver). -- [lucid][R500 X1400] intermitent screen corruption (pink world ) - regression from -20 to -21 kernel https://bugs.launchpad.net/bugs/545096 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
