Le Friday 10 April 2009 13:37:02 Julien Cristau, vous avez écrit : > Yes. Not having a write-combining mapping for the framebuffer is a big > fat fail. Downgrading to testing xserver makes the problem disappear and the /proc/mtrr revert to: reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back reg01: base=0x0c0000000 ( 3072MB), size= 256MB, count=1: write-combining Yannick