linux-kernel - Re: 2.6.20-rc3 regression: suspend to RAM broken on Mac mini Core Duo

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Message-ID: <20070109231655.GA5958@thinkpad.home.local>
Date:	Wed, 10 Jan 2007 00:16:55 +0100
From:	Tino Keitel <tino.keitel@...ei.de>
To:	Luming Yu <luming.yu@...il.com>
Cc:	Adrian Bunk <bunk@...sta.de>, Lee Revell <rlrevell@...-job.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.20-rc3 regression: suspend to RAM broken on Mac mini Core Duo

On Tue, Jan 09, 2007 at 22:51:04 +0800, Luming Yu wrote:
> >> > It didn't. It looks like it is unusable, becuase it isn't reliable in
> >> > 2.6.20-rc3.
> >>
> >> Is this issue still present in -rc4?
> >
> >I used 2.6.20-rc4 in single user mode, and applied 2 patches from
> >netdev to get wake on LAN support. This way I was able to set up an
> >automatic suspend/resume loop. It looked good, but after e.g. 20
> >minutes, the resume hang. So it is reproduceable with 2.6.20-rc4.
> >Unfortunately, I can not test the same with 2.6.18, as the wake on LAN
> >patches need 2.6.20-rc.
> 
> Hmm, do you mean this is the first time of this kind of testing?
> Is this issue related to LAN driver?
> I guess you should be able to set up an automatic suspend/resume loop
> with /proc/acpi/alarm, and test similar with 2.6.18.

Thanks for the hint. I just used /proc/acpi/alarm to set up a
suspend/resume loop and did ca. 100 cycles in a row with 2.6.18.2 in
single user mode, without a failure.

Regards,
Tino
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