Comment 10 for bug 314928

Created an attachment (id=24973)
Xorg log after

kernel 2.6.29.1, X server 1.6.1, intel driver 2.7.0, and EXA acceleration

At first X start, acceleration is normal. Then if X is restarted, I loose it (glxgears reports half the expected FPS, games are extremely slow).

Seems to be related to mtrr :

Before :
reg00: base=0x000000000 ( 0MB), size= 1024MB, count=1: write-back
reg01: base=0x03f700000 ( 1015MB), size= 1MB, count=1: uncachable
reg02: base=0x03f800000 ( 1016MB), size= 8MB, count=1: uncachable
reg03: base=0x0c0000000 ( 3072MB), size= 256MB, count=1: write-combining

After :
reg00: base=0x000000000 ( 0MB), size= 1024MB, count=1: write-back
reg01: base=0x03f700000 ( 1015MB), size= 1MB, count=1: uncachable
reg02: base=0x03f800000 ( 1016MB), size= 8MB, count=1: uncachable

After restarting, there is this error in xorg log:

(WW) intel(0): ESR is 0x00000001, instruction error
(WW) intel(0): Existing errors found in hardware state.