The Chavers

My Lenovo X301 will occasionally lockup after a suspend to ram -> resume.  To fix it, I found this solution:

 

#!/bin/sh
# Workaround for concurrency bug in xserver-xorg-video-intel 2:2.4.1-1ubuntu10.
# Save this as /etc/pm/sleep.d/00CPU

. "${PM_FUNCTIONS}"

case "$1" in
    hibernate|suspend)
        for i in /sys/devices/system/cpu/cpu*/online ; do
            echo 0 >$i
        done
        ;;
    thaw|resume)
        sleep 10    # run with one core for 10 secs
        for i in /sys/devices/system/cpu/cpu*/online ; do
            echo 1 >$i
        done
        ;;
    *)
        ;;
esac 

 

I haven't had the problem since; knock on wood...