linux-kernel - Re: suspend/hibernation regression between 2.6.19 and 2.6.20 w/ Thinkpad T41

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Message-ID: <20070805201146.GA16723@khazad-dum.debian.net>
Date:	Sun, 5 Aug 2007 17:11:46 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Toralf Förster <toralf.foerster@....de>
Cc:	ibm-acpi@....eng.br, ibm-acpi-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: suspend/hibernation regression between 2.6.19 and 2.6.20 w/
	Thinkpad T41

On Sun, 05 Aug 2007, Toralf Förster wrote:
> It is a small - but IMHO nagging - regression between these 2 kernel versions.
> 
> To make a "software suspend" at this notebook ("suspend to RAM") you have
> to press <Fn>+ <F4>. Pressing the <Fn>-Key after that wakes up the notenbook.
> 
> If you hibernated the system ("suspend to disc"), you have to press the power
> button to wake up the notebook.
> 
> But now there is an issue if you want to wake up this notebook, after it was
> suspended with <Fn>+<F4> again. It is now not possible to wake it up with <Fn>,
> instead you have to press the power button as you would have it to do after a
> hibernation.
> 
> This issue occures in the current 2.6.21 kernel too.
> (all tested at a stable Gentoo system - also with git-kernel-versions).

I am at a loss of how thinkpad-acpi could in any way cause, or change, the
firmware wake-up notification behaviour.

That said, my T43 with 2.6.21 and latest-of-the-latest thinkpad-acpi wakes
up from S3 just fine by pressing the "Fn" key and holding it down for ~2s.
I didn't know it did that :-)  I always use the power button.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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