Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-10 Thread Jani Nikula
On Tue, 10 Jun 2014, Daniel Vetter wrote: > On Mon, Jun 09, 2014 at 10:06:29PM +0300, Jani Nikula wrote: >> On Mon, 09 Jun 2014, Ville Syrjälä wrote: >> > On Mon, Jun 09, 2014 at 09:12:18PM +0300, Jani Nikula wrote: >> >> On Fri, 06 Jun 2014, Chris Wilson wrote: >> >> > It causes black screen on

Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-10 Thread Daniel Vetter
On Mon, Jun 09, 2014 at 10:06:29PM +0300, Jani Nikula wrote: > On Mon, 09 Jun 2014, Ville Syrjälä wrote: > > On Mon, Jun 09, 2014 at 09:12:18PM +0300, Jani Nikula wrote: > >> On Fri, 06 Jun 2014, Chris Wilson wrote: > >> > It causes black screen on bootup and is approximately 100x slower than > >

Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-09 Thread Jani Nikula
On Mon, 09 Jun 2014, Ville Syrjälä wrote: > On Mon, Jun 09, 2014 at 09:12:18PM +0300, Jani Nikula wrote: >> On Fri, 06 Jun 2014, Chris Wilson wrote: >> > It causes black screen on bootup and is approximately 100x slower than >> > running with FBC disabled, so the GPU runs at a high frequency for

Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-09 Thread Ville Syrjälä
On Mon, Jun 09, 2014 at 09:12:18PM +0300, Jani Nikula wrote: > On Fri, 06 Jun 2014, Chris Wilson wrote: > > It causes black screen on bootup and is approximately 100x slower than > > running with FBC disabled, so the GPU runs at a high frequency for much > > longer - completely contrary to the pow

Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-09 Thread Jani Nikula
On Fri, 06 Jun 2014, Chris Wilson wrote: > It causes black screen on bootup and is approximately 100x slower than > running with FBC disabled, so the GPU runs at a high frequency for much > longer - completely contrary to the power saving claims. It also still > has mutex deadlocks in multi-head s

Re: [Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-06 Thread Daniel Vetter
On Fri, Jun 06, 2014 at 10:37:11AM +0100, Chris Wilson wrote: > It causes black screen on bootup and is approximately 100x slower than > running with FBC disabled, so the GPU runs at a high frequency for much > longer - completely contrary to the power saving claims. It also still > has mutex deadl

[Intel-gfx] [PATCH] drm/i915: Disable FBC on Haswell

2014-06-06 Thread Chris Wilson
It causes black screen on bootup and is approximately 100x slower than running with FBC disabled, so the GPU runs at a high frequency for much longer - completely contrary to the power saving claims. It also still has mutex deadlocks in multi-head scenarios, which can lead to a system/X lockup. The