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From: john stultz <johnstul@us.ibm.com>
To: Alexander Mirgorodskiy <mirg@cs.wisc.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: apm standby on thinkpad
Date: Thu, 20 May 2004 11:16:18 -0700	[thread overview]
Message-ID: <1085076978.3121.12.camel@leatherman> (raw)
In-Reply-To: <40AB65B3.2070102@cs.wisc.edu>

On Wed, 2004-05-19 at 06:48, Alexander Mirgorodskiy wrote:
> 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".
> 
> 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")

Just for a datapoint, I cannot reproduce the issue using 2.6.6 on a T40
installed with Fedora Core 1.
-john


  reply	other threads:[~2004-05-20 18:16 UTC|newest]

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

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