Comment 40 for bug 1615871

(In reply to Michel Dänzer from comment #22)
> (In reply to Martin Peres from comment #21)
> > I tried using the modesetting driver and got absolute garbage out. Stale
> > rendering, extreme slowness. Why didn't I think of this before...
> >
> > Anyway, will try to see if I can fix this issue. Seems like I will have a
> > happy time in glamor and mesa's code tomorrow.
>
> Note that I couldn't reproduce this problem with xf86-video-ati using
> glamor. I guess the problem could be in the Mesa driver, but the modesetting
> driver seems more likely.

Well, the problem is likely limited to Intel. We will likely need a patch like this one[1] until we get explicit fencing.

[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=fc984e8953d61901b255422c8f56eb79a2dd2a28