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

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Date:	Tue, 08 Apr 2008 14:39:43 +0200
From:	Soeren Sonnenburg <kernel@....de>
To:	Romano Giannetti <romanol@...omillas.es>
Cc:	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 14:35 +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).

Soeren
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