hibernate/resume failure powerbook g4

For several versions, suspend/hibernate has not worked on my PowerPC G4 Titanium laptop. It did work at some time in the past (though, its been so long I can't recall what version it last worked on).

This is no big deal to me, as I rarely use this laptop. But if providing more info, doing some tests, etc. would help other users I'm happy to oblige.

Thanks,
Steve

ProblemType: KernelOops
Annotation: This occured during a previous hibernate and prevented it from resuming properly.
Architecture: powerpc
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/share/apport/apportcheckresume
Failure: hibernate/resume
InterpreterPath: /usr/bin/python2.6
Package: linux-image-2.6.28-4-powerpc 2.6.28-4.10
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/share/apport/apportcheckresume
ProcEnviron: PATH=(custom, no user)
SourcePackage: linux-ports
StressLog: Error: [Errno 2] No such file or directory: '/var/lib/pm-utils/stress.log'
Tags: resume hibernate
Title: hibernate/resume failure
Uname: Linux 2.6.28-4-powerpc ppc
UserGroups: