linux-kernel - Re: [RFT] x86 acpi: normalize segment descriptor register on resume

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Message-ID: <48791675.6060805@myrealbox.com>
Date:	Sat, 12 Jul 2008 16:39:17 -0400
From:	Andy Lutomirski <luto@...ealbox.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	luto@...ealbox.com, Andi Kleen <andi@...stfloor.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	kernel-testers-u79uwXL29TY76Z2rM5mHXA@...lic.gmane.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: [RFT] x86 acpi: normalize segment descriptor register on resume

Rafael J. Wysocki wrote:
> On Saturday, 12 of July 2008, Andy Lutomirski wrote:
>> My Lenovo X61s fails to resume if I suspend it from within X, on both 
>> 2.6.26-rc9 and recent wireless-testing.  2.6.26-rc8 is fine, as is 
>> wireless-testing with 4b4f7280 reverted.  My in-progress bisect between 
>> -rc8 and -rc9 is also consistent with this being the problem.
>>
>> The symptom is that, when I push the power button to resume, the hard 
>> drive light turns on, the fan turns on, then the hard drive light turns 
>> off, the sleep light stays on, and the fan keeps running.  Sometimes the 
>> battery light will blink off very briefly (1/4 sec, maybe) every few 
>> seconds.  The system is locked hard at this point.
>>
>> I'm using Ubuntu Hardy userspace.
> 
> Well, that's bad.
> 
> There is the bugzilla entry at http://bugzilla.kernel.org/show_bug.cgi?id=11064
> for this bug and you've just confirmed my suspicion that this particular
> commit is to blame.
> 
> Can you please see if the appended patch changes anything?

More correctly:

If I suspend by typing pm-suspend or echo mem >/sys/power/state, then it 
resumes just fine.  If I log in to Gnome and push the suspend button, 
then it does not resume.  This seems to be the case with or without your 
patch.

-rc8 and -rc9 with the original patch 4b4f7280 resume fine no matter how 
I suspend.

--Andy
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