linux-ext4 - Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes (v2)

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Date:	Mon, 26 Sep 2011 00:10:50 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Christoph <cr2005@...lub.de>
Cc:	Dave Chinner <david@...morbit.com>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...onice.net>,
	Christoph Hellwig <hch@...radead.org>, xfs@....sgi.com,
	LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org,
	"Theodore Ts'o" <tytso@....edu>, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes (v2)

On Sunday, September 25, 2011, Christoph wrote:
> On 25.09.2011 15:32, Rafael J. Wysocki wrote:
> > On Sunday, September 25, 2011, Christoph wrote:
> >> test results of the patch below:
> >> 
> >> 1. real machine
> >> 
> >> suspends fine but on wakeup, after loading image: hard reset. nvidia
> >> gpu => disabled compitz  => wakeup worked two times.
> > 
> > Hmm, so there's a separate bug related to NVidia I guess.
> 
> Maybe.
> 
> Just made another test: the machine (macbook) woke up, loaded image, thaw.
> It got stuck at vt#1, displaying console with login. Cursor blinking, but
> no (usb) keyboard or network enabled. Bricked?!!
> 
> 
> On the other hand I've got another box with nvidia gpu:
> 
> debian5 32bit
> 2.6.38.2+ #3 SMP Fri Apr 1
> nvidia 260.19.36
> 
> It's up since I compiled the kernel: I use it twice a week and I kept it
> freezed all the time. It was solid rock until today: hard reset on resume.
> WTF? (I remember this version combo was stable on the macbook but the
> kernel lacks a solid wireless driver).

If that's an x86_64 system, there is a known bug causing problems like
this to happen.  There's a patch fixing it, but not conclusive:
http://marc.info/?l=linux-kernel&m=131653513414314&w=2

Thanks,
Rafael
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