On Tue, Jun 21, 2016 at 03:31:25PM +0200, Daniel Vetter wrote: > On Tue, Jun 21, 2016 at 08:25:27AM +0100, Chris Wilson wrote: > > Erratum SKL075: Display Flicker May Occur When Both VT-d And FBC Are Enabled > > > > "Display flickering may occur when both FBC (Frame Buffer Compression) > > and VT - d (Intel® Virtualization Technology for Directed I/O) are enabled > > and in use by the display controller." > > > > Ville found the w/a name in the database: > > WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl > > > > v2: Log when the quirk is applied. > > v3: Ensure i915.enable_fbc is false when !HAS_FBC() > > > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Do we know whether this helps on other machines too? I can imagine that > the additional lookup latency just plain wreaks havoc everywhere ... Yeah, they do tend to play into fifo trouble. Could find anything though. But I think we have enough evidence to suggest acking this w/a and moving forward if we find any others... -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
