From: Nigel Cunningham <ncunningham@cyclades.com>
Organization: Cyclades Corporation
To: Sanjoy Mahajan <sanjoy@mrao.cam.ac.uk>
Subject: Re: S3 sleep regression / 2.6.16-rc1+acpi-release-20060113
Date: Sat, 4 Feb 2006 17:12:25 +1000
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Hi.

On Saturday 04 February 2006 15:02, Sanjoy Mahajan wrote:
> The gory details are at
> <http://bugzilla.kernel.org/show_bug.cgi?id=3D5989>, but the short
> summary:
>
> With 2.6.15, S3 sleep and wake were 98% fine (once in a while waking
> would hang, but I haven't managed to reproduce it).  However, with
> 2.6.16-rc1 with the acpi-20060113 patch, the first sleep and wake goes
> fine and the second sleep hangs at the 'Stopping tasks'.

After the first suspend, do you have any processes sucking all available=20
cpu? This sounds like a thread that has been added since 2.6.15, which is=20
being told to enter the freezer, but isn't doing it. They usually end up=20
sucking cpu afterwards.

Regards,

Nigel

> With tons of debugging turned on, the second sleep does not hang, but
> the wakeup hangs.  With 0x1F as the acpi debug_level, the second sleep
> still hangs and produces some output across a serial console.  In the
> second sleep (after the second 'Stopping tasks'), it endlessly repeats
> a short sequence of
>
> exregion-0182 ...
> exregion-0287 ...
> exregion-0182 ...
>
> The machine is a TP 600X with the latest (1.11) BIOS and a fixed DSDT
> so that it can S3 sleep at all.
>
> -Sanjoy
>
> `Never underestimate the evil of which men of power are capable.'
>          --Bertrand Russell, _War Crimes in Vietnam_, chapter 1.
> -
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