linux-kernel - Re: PROBLEM: Suspend corrupts bios clock since 2.6.21

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Date:	Sun, 26 Aug 2007 13:38:57 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Andreas Steffan <a.steffan@...s-online.de>
Cc:	linux-pm@...ts.linux-foundation.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, pavel@...e.cz,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: Suspend corrupts bios clock since 2.6.21

Andreas Steffan wrote:
> Hallo everybody,
> 
> I am running fedora core 7 on my Dell latitude D810 notebook (BIOS
> rev A05).
> 
> Since 2.6.21 I found that suspending (to disk and to ram) corrupts
> the bios clock most of the time (not always). The corruption is
> happening during suspend. When I enter the system bios right after
> I switch the system back on, I find the bios clock is set to a time
> far in the future (many years). I guess that problem is related to
> the clock changes that where introduced with 2.6.21.
> 
> Please let me know if you want me to provide further information to
> get this problem fixed.
> 
> If there is a known quirk to work around this problem, I would
> really appreciate a hint.
> 
> PS: I have not yet tried 2.6.22.4-65.fc7, but the latest 2.6.22 kernel
> before showed the same behaviour for me.

Please check if PM_TRACE is enabled in your kernel configuration. It 
will do this intentionally.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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