On Tue, Jan 17, 2012 at 12:16, Chris Wilson <chris at chris-wilson.co.uk> wrote: > 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. Keith, I think the disable-fbc-on-snb should go to -fixes. Eugeni can meanwhile figure out whether it's worth it on ivb or not and what we should do with this mess in -next. Hence this patch is (for -fixes) Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> -Daniel -- Daniel Vetter daniel.vetter at ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch
