[Bug 578138] Re: Thinkpad T400 (model 2765-TDG) fails to resume after second suspend

[Alex Chiang]

@madbiologist, I'm a little confused.

Are you looking for an Ubuntu kernel patch for Lucid, or are you really
asking for a 2.6.34 upstream patch?

If you're really asking for upstream, I'm sorry to say, the answer is
"no". Let me explain.

We really don't want to add any more machines to that DMI table, and
there has been quite a bit of effort upstream by Matthew Garrett to find
the proper fix. I think he's pretty much got it now:

http://thread.gmane.org/gmane.linux.acpi.devel/45907

Matthew's patch should fix the bug once and for all. I believe it will
be targeted for 2.6.35.

In the meantime, please use the kernel command line workaround
"acpi_sleep=sci_force_enable". I know this is annoying, but should be
quite manageable if you're adventurous enough to run an upstream kernel.

For Lucid, it's a different story. We can add an Ubuntu-specific patch
to handle this machine.

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Thinkpad T400 (model 2765-TDG) fails to resume after second suspend
https://bugs.launchpad.net/bugs/578138
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