linux-kernel - Re: 2.6.18-rc4 (and earlier): CMOS clock corruption during suspend to disk on i386

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Message-Id: <1155145440.5418.21.camel@localhost.localdomain>
Date:	Wed, 09 Aug 2006 10:44:00 -0700
From:	john stultz <johnstul@...ibm.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	Pavel Machek <pavel@....cz>, Andrew Morton <akpm@...l.org>
Subject: Re: 2.6.18-rc4 (and earlier): CMOS clock corruption during suspend
	to disk on i386

On Wed, 2006-08-09 at 14:26 +0200, Rafael J. Wysocki wrote:
> It looks like the CMOS clock gets corrupted during the suspend to disk
> on i386.  I've observed this on 2 different boxes.  Moreover, one of them is
> AMD64-based and the x86_64 kernel doesn't have this problem on it.
> 
> Also, I've done some tests that indicate the corruption doesn't occur before
> saving the suspend image.  It rather happens when the box is powered off
> or rebooted (tested both cases).

Hmmm. Could you better describe the corruption you're seeing? 

I've just gotten a report about uptime reporting odd values after resume
when the CMOS clock was set to the past during a suspend to disk, but
that's somewhat expected and I would think it would occur on x86_64 as
well.

thanks
-john


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