After a Feisty->Gusty upgrade I have a similar problem with an IBM X41
tablet.
The suspend-to-disk operation seems to take fairly long, but eventually
finishes. On resume the boot procedure reaches the Ubuntu splash screen
and then stalls indefinitely. Using the suspend key or "echo disk >
/sys/power/state" results in the same scenario. I noticed some
suggestions elsewhere that this could be related to the graphics driver
(the laptop uses i915) - however stopping X does not seem to make a
difference.
For me it seems that changing HIBERNATE_MODE to "shutdown" in
/etc/default/acpi-support is slightly more successful. On a fresh boot
the machine can reliably suspend/resume, but repeating the operation
causes it to hang on resume every now and then.
** Changed in: ubuntu
Status: New => Confirmed
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Acer laptop: Suspend broken in Gutsy [regression]
https://bugs.launchpad.net/bugs/156084
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