linux-kernel - Re: can't resume from ACPI S3 with TICK

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Date:	Tue, 11 Jan 2011 15:13:59 +0100
From:	Borislav Petkov <bp@...64.org>
To:	"James C. Georgas" <james.georgas@...oo.ca>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Herrmann3, Andreas" <Andreas.Herrmann3@....com>
Subject: Re: can't resume from ACPI S3 with TICK_ONESHOT

On Fri, Jan 07, 2011 at 12:15:50PM -0500, James C. Georgas wrote:
> On Fri, 2011-01-07 at 12:16 +0100, Borislav Petkov wrote:
> > On Wed, Jan 05, 2011 at 10:46:25AM -0500, James C. Georgas wrote:
> > > Let me know if you need more.
> > 
> > Yeah, what does
> > 
> > xxd /sys/firmware/acpi/tables/HPET
> > 
> > say?
> > 
> 
> Tachyon james # xxd /sys/firmware/acpi/tables/HPET
> 0000000: 4850 4554 3800 0000 012a 5054 4c54 4420  HPET8....*PTLTD 
> 0000010: 4850 4554 5442 4c20 0000 0406 204c 5450  HPETTBL .... LTP
> 0000020: 0100 0000 1082 5343 0000 0000 0000 d0fe  ......SC........
> 0000030: 0000 0000 0080 0000                      ........
> Tachyon james # 

Ok, I don't see anything irregular here. Can you try booting the
original tickless (NO_HZ) configuration without the "nohpet" boot option
and wait >= 5 mins after resume to see whether your machine comes to
life afterall. The 5min means we want to wait until the 32-bit HPET
counter overflows to see whether the timer gets programmed with an event
in the past right after resume.

Thanks.

-- 
Regards/Gruss,
Boris.

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