Per, I am still watching this issue for interest (my case I do consider as "wrong" BIOS setting which solved it for me).
To my knowledge mtrr's are still used (not by i915 as Ben Hutchings stated) and probably here certain manufacturers of boards/BIOS probably set up different configurations. Probably it ist worth to try this kernel parameter with Wheezy's standard kernel: "enable_mtrr_cleanup" to allow kernel to re-arrange them and see if it has any influence in your case? Ingo -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org