[Bug 35213] hibernate fails when not on AC power on HP Pavilion ZT3000 - regression from breezy

[James Troup]

Public bug reported:
https://launchpad.net/malone/bugs/35213

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I have a HP Pavilion ZT3000.  Suspend doesn't work (and never has).  In
Breezy hibernate worked most of the time (failing occasionally and
without an obvious pattern).  After upgrading to Dapper, hibernate will
only work if the machine is on AC power.  If I hibernate while on
battery, the hibernation process starts, but hangs midway with the disk
light permanently on.  The only thing I can do from there is hold down
the power button and hard-power-off the machine.