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From: Alexander Mirgorodskiy <mirg@cs.wisc.edu>
To: linux-kernel@vger.kernel.org
Subject: apm standby on thinkpad
Date: Wed, 19 May 2004 08:48:35 -0500	[thread overview]
Message-ID: <40AB65B3.2070102@cs.wisc.edu> (raw)

Folks,

I ran into a problem with APM on a Thinkpad T41: the system cannot
properly resume after a standby. The backlight turns on, but the
screen remains blank. This happens on keypress (fn-f3) and
idle-time-induced standbys. However, resume after "apm -S" works just
fine.

I inserted some trace statements into the apm kernel driver and found
that it does not seem to receive standby and resume notifications from
BIOS if standby is initiated through fn-f3. At the same time, it does
receive the notification on a resume from "apm -S".

Any idea why that happens?

Thanks,
Alex

--

P.S: I see this on a RedHat 9 system with the 2.4.20 kernel. For a
bunch of reasons, I cannot upgrade to anything else in the short
term. (I did try 2.4.26, but it behaved even worse -- didn't wake up
at all, even if standby was entered with "apm -S")



             reply	other threads:[~2004-05-19 13:48 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-05-19 13:48 Alexander Mirgorodskiy [this message]
2004-05-20 18:16 ` apm standby on thinkpad john stultz
2004-05-20 21:23   ` Alexander Mirgorodskiy
2004-05-23 19:08 ` Alexander Mirgorodskiy

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