linux-kernel - [Regression, post-rc2] Commit a5ee4eb7541 breaks OpenGL on RS780 (was: Re: Linux 2.6.34-rc3)

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Date:	Tue, 30 Mar 2010 23:16:45 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...il.com>,
	dri-devel@...ts.sourceforge.net,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Clemens Ladisch <clemens@...isch.de>,
	Alex Deucher <alexdeucher@...il.com>, stable@...nel.org,
	Greg KH <gregkh@...e.de>
Subject: [Regression, post-rc2] Commit a5ee4eb7541 breaks OpenGL on RS780 (was: Re: Linux 2.6.34-rc3)

On Tuesday 30 March 2010, Linus Torvalds wrote:
...
> Other than that? Random fixes and updates all over. Mostly drivers and 
> filesystems, and mostly fairly small things. If you had PCI resource 
> conflict problems with the early -rc's due to the _CRS window thing, for 
> example, that should hopefully be fixed. See the appended shortlog for 
> other details.

...

> Clemens Ladisch (4):
>       firewire: core: fw_iso_resource_manage: fix error handling
>       firewire: ohci: add cycle timer quirk for the TI TSB12LV22
>       ALSA: cmipci: work around invalid PCM pointer
>       PCI quirk: RS780/RS880: work around missing MSI initialization

This one (commit a5ee4eb7541) broke OpenGL acceleration on my new test box
which happens to have a RS780.

The symptom is that every operation involving the GPU is _very_ slow, so the
window manager eventually disables compositing.  Reverting this commit makes
things work flawlessly again.

So, please revert.

BTW, I don't think it's a -stable material.

Thanks,
Rafael
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