linux-kernel - Re: [PATCH] pci: Add quirk for still enabled interrupts on Intel Sandy Bridge GPUs

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Date:	Fri, 10 Feb 2012 11:45:52 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Thomas Jarosch <thomas.jarosch@...ra2net.com>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Charlie Suffin <charlie.suffin@...atus.com>, stable@...nel.org
Subject: Re: [PATCH] pci: Add quirk for still enabled interrupts on Intel
 Sandy Bridge GPUs

On Wed, 07 Dec 2011 22:08:11 +0100
Thomas Jarosch <thomas.jarosch@...ra2net.com> wrote:

> Some BIOS implementations leave the Intel GPU interrupts enabled,
> even though no one is handling them (f.e. i915 driver is never loaded).
> Additionally the interrupt destination is not set up properly
> and the interrupt ends up -somewhere-.
> 
> These spurious interrupts are "sticky" and the kernel disables
> the (shared) interrupt line after 100.000+ generated interrupts.
> 
> Fix it by disabling the still enabled interrupts.
> This resolves crashes often seen on monitor unplug.

Applied to my -next branch finally (sorry I missed your last reply),
thanks Thomas.

-- 
Jesse Barnes, Intel Open Source Technology Center

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