Re: Regression with i915 and suspend on Thinkpad x220

[Matt Mackall]

On Sat, 2011-05-21 at 23:23 -0700, Keith Packard wrote:
> On Sat, 21 May 2011 23:55:57 -0500, Matt Mackall <mpm@xxxxxxxxxxx> wrote:
> 
> > I've got a new Thinkpad x220 which won't wake up from suspend with
> > 2.6.39, but works fine with 2.6.37.
> > 
> > I bisected it down to this cset:
> > 
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4efe070896e1f7373c98a13713e659d1f5dee52a
> > 
> > drm/i915: make the blitter report buffer modifications to the FBC unit
> 
> For now, you should be able to disable FBC:
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index c34a8dd..2a82895 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -183,7 +183,7 @@ static const struct intel_device_info intel_sandybridge_d_info = {
>  static const struct intel_device_info intel_sandybridge_m_info = {
>  	.gen = 6, .is_mobile = 1,
>  	.need_gfx_hws = 1, .has_hotplug = 1,
> -	.has_fbc = 1,
> +	.has_fbc = 0,
>  	.has_bsd_ring = 1,
>  	.has_blt_ring = 1,
>  };

Appears to work, thanks.

-- 
Mathematics is the supreme nostalgia of our time.


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