Sorry for the delay in replying. The notification email triggered by
your comment got lost in the noise, I'm afraid, and I forgot all about
this.

Well, suspend/resume usually works - indeed it's been 10 days since the
last time it failed, and I suspend and resume about a dozen times every
day. Unfortunately, it fails frequently enough that I'm now extra wary
to make sure that my laptop does indeed fully suspend when I ask it to.
This intermittent failure has being going on for the past 18 months, so
this isn't a recent problem. I don't think it's a hardware issue either,
as everything used to work fine under Windows (I'm a bit of a Linux
newbie). I was stung a while back, when my laptop failed to shut down
properly, and I didn't notice. I packed the laptop away in a bag, and
when I came back to it, it was extremely hot, the hard-drive was fried,
and the battery was somewhat depleted on a permanent basis - grrr!

Currently, I'm running Ubuntu 2.6.28-11.35-generic, and have run every
version released by Ubuntu since the first Jaunty Alpha. There's been no
noticable change in the frequency of occurrence, but it happens too
infrequently to be sure what's really going on.

I haven't noticed any failure when running the suspend script from VT1
rather than from an X session, but again the issue is too intermittent
for this to really mean much.

I've had a look at the DebuggingKernelSuspend you mentioned, but it's
all a bit outside my zone of comfort. I'll have to back some data up
first, so I don't have much to lose if things go pear-shaped. One thing
that's mentioned is that suspend/resume problems are usually due to the
resume phase, often with an offending device driver not awakening
correctly. I should point out that I don't get that far. My laptop fails
to fully suspend. My only recourse at that point is a hard shut down
(power button for four seconds). Of course, after this, there is no
resume - only a fresh, clean boot.

Finally, as much as I'd like to be able to state a specific set of
circumstances under which this problem occurs, I'm unable to reliably
repeat the problem As far as I can tell, it's pretty much random. I do
run my battery down to nearly empty from time to time, but this doesn't
seem to have any effect on the problem.

Regards,

Chris

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[Dell Inc. MM061] suspend/resume failure
https://bugs.launchpad.net/bugs/336231
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