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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/fix-mtrr-local.sh && { /sbin/modprobe --ignore-install $CMDLINE_OPTS drm ; }

    /sbin/fix-mtrr-local.sh

    #modify the grep arg and disable= to your needs
    #!/bin/sh

    grep write-protect /proc/mtrr

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


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