I get similar problems with my Toshiba Tecra S1 with a Mobility 9000 R250 i.e. desktop is unbearably slow both with and without compiz going. Feisty was fine with compiz running.
Xorg.0.log reports that DRI is enabled, however glxinfo says that indirect rendering is being used and nothing shows when I set the debug variables. I also get kernel messages about mtrrs not being found: [ 2743.024000] mtrr: no MTRR for a8000000,2000000 found [ 2745.508000] agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0. [ 2745.508000] agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode [ 2745.508000] agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode [ 2746.812000] [drm] Setting GART location based on new memory map [ 2746.812000] [drm] Loading R200 Microcode [ 2746.812000] [drm] writeback test succeeded in 2 usecs Is it possible that drm is trying to use the wrong mtrr? a8000000,2000000 suggests it's looking for a 32MB mtrr at a8000000, however: $ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 reg01: base=0xb0000000 (2816MB), size= 64MB: write-combining, count=1 reg02: base=0xa8000000 (2688MB), size= 128MB: write-combining, count=2 I'd try and change the AGP aperture like it says in the wiki, but the laptop bios doesn't have this option. ** Attachment added: "xorg.conf" http://launchpadlibrarian.net/10284646/xorg.conf -- [gutsy] horrible performance with ati open source drivers https://bugs.launchpad.net/bugs/150863 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
