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Subject: Re: Suspend to {mem,disk} broken in 2.6.15-rc6/rc7 on my T42
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Jules Villard <jvillard@ens-lyon.fr>, linux-kernel@vger.org,
       Andrew Morton <akpm@osdl.org>, Dave Airlie <airlied@linux.ie>
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References: <20051226194527.GA3036@blatterie>
	 <Pine.LNX.4.64.0512261545460.14098@g5.osdl.org>
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Date: Tue, 27 Dec 2005 11:00:18 +1100
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On Mon, 2005-12-26 at 15:55 -0800, Linus Torvalds wrote:
> 
> On Mon, 26 Dec 2005, Jules Villard wrote:
> > 
> > Please find my .config and the lspci output attached (my graphic card
> > is a AGP plugged ATI Radeon Mobility 7500 and I use the "radeon"
> > driver from xorg).
> 
> Ok, from the sysrq-T stuff it _looks_ like X is just busy-looping in user 
> space. So it's probably some disagreement between radeonfb and X.org
> 
> The fact that everything was ok in -rc5 would imply that it's likely one 
> of the radeon aperture size issue patches.
> 
> > Investigating a bit further, I found out that resume is quite innocent
> > about all this: what hangs X is switching from a vt to X.
> 
> I'm cc'ing BenH and DaveA, but in the meantime, while waiting for the 
> professionals, can you try to revert the two attachments (revert "diff-1" 
> first, try that, and revert "diff-2" after that if it didn't start 
> working after the first revert).

Also, does it work if you don't use radeonfb ? radeonfb shouldn't touch
MC_AGP_LOCATION and the DRM change only affects that, so I'm a bit
surprised.

Ben.