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SubjectRe: MTRR allocation failure

On Fri, 9 Sep 2011, Yinghai Lu wrote:
> your BIOS create one new WP entry. so mtrr sanitizer is not triggered...
> Maybe you can just delete first entry before you load drm?

Thank you! That fixes the issue for me.

If anyone else has extra/write-protect entry in /proc/mtrr that can be
deleted - here is what you can drop in /etc/modprobe.d/drm.conf -

# Free up a mtrr entry for drm
install drm /sbin/ && { /sbin/modprobe --ignore-install $CMDLINE_OPTS drm ; }

#modify the grep arg and disable= to your needs

grep write-protect /proc/mtrr

if [ $? -eq 0 ]; then
echo "disable=0" > /proc/mtrr
exit 0

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