More logs:
conn@inspiron:~/i855bug$ glxinfo | grep direct direct rendering: Yes
conn@inspiron:~/i855bug$ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 reg01: base=0x1ff00000 ( 511MB), size= 1MB: uncachable, count=1 reg02: base=0xfeda0000 (4077MB), size= 128KB: write-through, count=1 reg03: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1
More logs:
conn@inspiron: ~/i855bug$ glxinfo | grep direct
direct rendering: Yes
conn@inspiron: ~/i855bug$ cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg01: base=0x1ff00000 ( 511MB), size= 1MB: uncachable, count=1
reg02: base=0xfeda0000 (4077MB), size= 128KB: write-through, count=1
reg03: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1