From: Chris Wilson <chris@chris-wilson.co.uk>
To: Daniel Vetter <daniel@ffwll.ch>, Eugeni Dodonov <eugeni@dodonov.net>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915:: Disable FBC on SandyBridge
Date: Tue, 17 Jan 2012 11:16:01 +0000 [thread overview]
Message-ID: <e39f63$3bs5ul@fmsmga002.fm.intel.com> (raw)
In-Reply-To: <20120117105705.GH4093@phenom.ffwll.local>
On Tue, 17 Jan 2012 11:57:05 +0100, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Tue, Nov 08, 2011 at 11:17:34PM +0000, Chris Wilson wrote:
> > Enabling FBC is causing the BLT ring to run between 10-100x slower than
> > normal and frequently lockup. The interim solution is disable FBC once
> > more until we know why.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>
> Iirc fbc isn't really worth it power-wise on snb and we don't implement it on
> ivb. So shouldn't we just disable it completely? Eugeni, any opinions - I
> think you're most up to speed on power saving figures for snb?
Also note that I've had a couple of people confirm this bug and tested
the patch on IRC. Doesn't help explain precisely what is wrong nor if
there is a better workaround amidst the chicken bits that we've missed.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
next prev parent reply other threads:[~2012-01-17 11:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-08 23:17 [PATCH] drm/i915:: Disable FBC on SandyBridge Chris Wilson
2012-01-17 10:57 ` Daniel Vetter
2012-01-17 11:16 ` Chris Wilson [this message]
2012-01-17 15:12 ` Daniel Vetter
2012-01-26 14:31 ` Daniel Vetter
2012-01-26 17:58 ` Keith Packard
2012-01-17 13:21 ` Eugeni Dodonov
2012-01-26 18:01 ` Keith Packard
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