I've experienced the same bug in several releases, including 12.04.
The machine is a Dell Latitude D430
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller (rev 03)
Adding the xorg.conf snippet in #24 seems to help, based on
A related issue here, I have a Samsung HS122JC in my Dell D430, and
after updating to XUbuntu 12.04, I noticed that the HD started surging
on battery power. Basically it spins up a bit faster for a while and the
drive LED on the laptop glows solid for a moment while everything hangs,
then it frees
