On Tue, 17 Jan 2012 11:57:05 +0100, Daniel Vetter <daniel at 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 at 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
