linux-kernel - Re: 2.6.25-rc6 regression - hang on resume [Bug 10319]

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Date:	Tue, 08 Apr 2008 15:32:14 +0200
From:	Soeren Sonnenburg <kernel@....de>
To:	Fabio Comolli <fabio.comolli@...il.com>
Cc:	Romano Giannetti <romanol@...omillas.es>,
	Tino Keitel <tino.keitel@....de>,
	"Rafael J\. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bugme-daemon@...zilla.kernel.org,
	Jesse Barnes <jesse.barnes@...el.com>,
	suspend-devel@...ts.sourceforge.net
Subject: Re: 2.6.25-rc6 regression - hang on resume [Bug 10319]

On Tue, 2008-04-08 at 14:52 +0200, Fabio Comolli wrote:
> On Tue, Apr 8, 2008 at 2:39 PM, Soeren Sonnenburg <kernel@....de> wrote:
> > On Tue, 2008-04-08 at 14:35 +0200, Romano Giannetti wrote:
> >  >
> >  > On Tue, 2008-04-08 at 10:58 +0200, Tino Keitel wrote:
> >  > > With 2.6.25-rc, the text console is fine after resume, due to the
> >  > > recent changes to the Intel i915 DRM driver. Maybe those people who
> >  > > used to use vbetool prior to 2.6.25 should check if this is still
> >  > > needed.
> >  >
> >  > Yep, the problem is just that: in 2.6.24 vbetool hacks (in my case,
> >  > using s2ram -p -m options) was needed to resume graphics. Now they are
> >  > not needed anymore, and using them _break_ resume.
> >  >
> >  > So, people with a working suspend-to-ram setup (even using the whitelist
> >  > in s2ram, I mean, simply calling s2ram) will discover that 2.6.25 break
> >  > their machine. Removing the s2ram package and suspending with
> >  > kernel-only machinery will work, but... well, it's not user-friendly.
> >
> >  The above holds only if you have an intel graphics adapter. For me
> >  (radeon) it really breaks (as in echo mem >/sys/power/state leaves me a
> >  black screen on resume and manually typing vbetool post or vbetool
> >  vgamode simply hangs the machine).
> >
> 
> For me (radeon X700) using binary fglrx xorg driver without the binary
> kernel module (which does not compile under .25rc for me)
> resume-from-ram works using s2ram.
> 
> Lightly tested with -rc8.
> 
> My laptop is in whitelist as VBE_POST|VBE_SAVE|NOFB .

I am talking about console only. X is a completely different issue
especially with fglrx (which will very likely do the re-init).

Soeren
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