Comment 23 for bug 659668

I have the same problem with my Lenovo W500 after an upgrade from 10.04 to 10.10. pm-suspend hangs leaving the sleep LED blinking forever. But acpitool -s seems to suspend correctly. I worked around this for now by replacing the pm_suspend link in /usr/sbin with a script that invokes acpitool.

su
apt-get install acpitool
mv /usr/sbin/pm-suspend /usr/sbin/pm-suspend.orig
echo /usr/bin/acpitool -s > /usr/sbin/pm-suspend
chmod ugo+rx /usr/sbin/pm-suspend