Bug#628080: xserver-xorg-video-radeon: Low performance after a period of inactivity

Michel Dänzer daenzer at debian.org
Thu Mar 22 00:08:57 PDT 2012

On Don, 2012-03-22 at 00:05 +0100, Stephen Kitt wrote: 
> On Wed, Sep 14, 2011 at 07:14:12PM +0200, dayer wrote:
> > El mié, 14-09-2011 a las 11:23 +0200, Michel Dänzer escribió:
> > > Since several IRQs are affected, I suspect this is a fundamental problem
> > > in the kernel/BIOS rather than in any driver.
> > 
> > I think the problem is my graphic card ATI Gigabyte HD4650 AGP 1GB. I'm
> > using it one or two years without problem until April 2011, when IRQs
> > problems started. In Windows XP there's no problem. And if I try
> > connecting an old ATI 9600 AGP 256MB in Linux there's no problem with
> > IRQs.
> I've been having a similar problem for a while now, with a similar
> graphics card (an XFX HD4650 AGP with 1GB of RAM): at every boot,
> regardless of irqpoll, the card's IRQ would end up being disabled. I
> hadn't bothered filing a bug because like Michel, I thought it was
> probably due to a BIOS bug.
> Today though I noticed a pattern: in every single instance, just after
> the IRQ got disabled, the kernel logged
> [   55.404002] Disabling IRQ #16
> [   56.912023] hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x000f0001
> So I wondered whether this might be somehow related to the
> snd-hda-intel driver attempting to initialize the HDMI audio
> output... I blacklisted the snd-hda-intel driver, and hey presto, no
> more errors.

Does enabling HDMI audio with radeon.audio=1 prevent the problem as

Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer

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