linux-kernel - Re: [BISECTED] drm: random hang since 620f378 "drm: prune modes when ..."

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Message-Id: <200912151051.44131.arnd@arndb.de>
Date:	Tue, 15 Dec 2009 10:51:43 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Dave Airlie <airlied@...hat.com>, Daniel Vetter <daniel@...ll.ch>,
	Adam Jackson <ajax@...hat.com>, linux-kernel@...r.kernel.org,
	dri-devel@...ts.sourceforge.net, keithp@...thp.com,
	eric@...olt.net, Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: [BISECTED] drm: random hang since 620f378 "drm: prune modes when ..."

On Monday 14 December 2009, Jesse Barnes wrote:
> This patch removes the suspect portion of the dynamic clock control
> code.  Hopefully it'll be as stable as powersave=0 in your config
> (assuming powersave=0 works :).

Ok, great! The machine is still running  fine with powersave=0 so 
far. I'll try your patch after some more uptime.

	Arnd

> Jesse Barnes, Intel Open Source Technology Center
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_d
> index 279dc96..b8730de 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3825,8 +3825,6 @@ void intel_decrease_renderclock(struct drm_device *dev)
>                 /* Down to minimum... */
>                 gcfgc &= ~GM45_GC_RENDER_CLOCK_MASK;
>                 gcfgc |= GM45_GC_RENDER_CLOCK_266_MHZ;
> -
> -               pci_write_config_word(dev->pdev, GCFGC, gcfgc);
>         } else if (IS_I965G(dev)) {
>                 u16 gcfgc;

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