Hi, Apologies for the delay in testing this.
The hard disk on this system was broken, which was probably affecting
results. I replaced the disk and retested, and the system still has a
problem, but looks a bit different this time.
Fwts reports that it completed the suspend/resume cycle the first time,
but subsequent tries report as not completed, with an error code and the
cycle taking less time than expected. This probably means the system
failed to enter suspend on subsequent tries.
This was reproducible on Quantal and with a mainline 3.8.0-rc6 kernel.
Visually, the symptom I see is that the backlight doesn't turn on. The
keyboard is responsive and I can blind-type stuff, and also ssh into the
system, but the screen is unusable.
This sounds like a nouveau problem; to back this up, I installed nvidia-
current, both for the 3.5 quantal kernel and the mainline 3.8.0-rc6, and
rebooted, the system is then able to complete 100 suspend/resume cycles.
** Changed in: linux (Ubuntu)
Status: Expired => Confirmed
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/990123
Title:
[Dell Precision M4500] Suspending many times causes the system to
freeze
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