Putting aside Xorg-air, this could be the problem. From the LiveCD: cat /proc/mtrr: reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 reg01: base=0x3f800000 (1016MB), size= 8MB: uncachable, count=1
I'm pretty sure it should be write-combined, something like this (using Xorg-air from a custom repo): [EMAIL PROTECTED]:~$ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 reg01: base=0x3f800000 (1016MB), size= 8MB: uncachable, count=1 reg02: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1 -- Serious 3D performance regression https://launchpad.net/bugs/47939 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
