Toshiba Tecra laptop running Ubuntu Karmic sometimes won't wake up after suspend

When I suspend my Toshiba Tecra laptop running Ubuntu Karmic, sometimes it won't wake up: the computer is running but the screen is black the keyboard doesn't seem to react. It happened that I could work some seconds after waking up, but then the screen suddenly turns black and the system freezes. I only could restart by switching the power off and on.
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Pierre FrançoisSenior consultantAsked:
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TobiasHolmCommented:
Hi!

Probably a bug in Ubuntu. Can you try to use "hibernate" instead of "suspend"? Or try tweaking your BIOS ACPI settings?

Ref: http://www.mail-archive.com/ubuntu-x-swat@lists.launchpad.net/msg52202.html

Regards, Tobias
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Pierre FrançoisSenior consultantAuthor Commented:
@TobiasHolm: I once used hibernate (this morning) and the laptop wake up as expected. I am still looking for a workaround for Karmic. It seems the bug is fixed on Lucid. I will keep you informed. The link was useful, but didn't help to find a workaround.
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TobiasHolmCommented:
ok. I hope there will be a bug fix for Karmic that you can get through the ordinary system update function.

Regards, Tobias
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Pierre FrançoisSenior consultantAuthor Commented:
It didn't fix the problem, but gave me hints to go further. The solution probably will be to upgrade from Karmic to Lucid.
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