On Mon, Jan 09, 2017 at 12:32:40AM -0600, lkml@xxxxxxxxxxx wrote: > Hello all, > > I'm experiencing display noise in the form of 8x1 pixel bars spuriously > appearing in random locations. This doesn't happen on 4.9, the machine > is an X61s, a Core2Duo 1.8Ghz w/XGA via LVDS. > > I was able to bisect the issue to a6a7cc4b7: > > commit a6a7cc4b7db6deaeca11cdd38844ea147a354c7a > Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Date: Fri Nov 18 21:17:46 2016 +0000 > > drm/i915: Always flush the dirty CPU cache when pinning the scanout > > Currently we only clflush the scanout if it is in the CPU domain. Also > flush if we have a pending CPU clflush. We also want to treat the > dirtyfb path similar, and flush any pending writes there as well. > > v2: Only send the fb flush message if flushing the dirt on flip > v3: Make flush-for-flip and dirtyfb look more alike since they serve > similar roles as end-of-frame marker. > > Reproduction is simple, just run this native drm eye candy program: > https://github.com/vcaputo/rototiller > This regression still remains as of 4.10.0-rc6. Chris Wilson had posted a fix: https://www.spinics.net/lists/kernel/msg2420777.html But it seems to have been ignored so far. How do we get this fixed in 4.10 before it ships? Regards, Vito Caputo _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
