Hi, On Thu, Jul 9, 2020 at 6:19 PM Steev Klimaszewski <steev@xxxxxxxxxx> wrote: > > Hi Doug, > > I've been testing 5.8 and linux-next on the Lenovo Yoga C630, and with this patch applied, there is really bad banding on the display. > > I'm really bad at explaining it, but you can see the differences in the following: > > 24bit (pre-5.8) - https://dev.gentoo.org/~steev/files/image0.jpg > > 18bit (5.8/linux-next) - https://dev.gentoo.org/~steev/files/image1.jpg Presumably this means that your panel is defined improperly? If the panel reports that it's a 6 bits per pixel panel but it's actually an 8 bits per pixel panel then you'll run into this problem. I would have to assume you have a bunch of out of tree patches to support your hardware since I don't see any device trees in linuxnext (other than cheza) that use this bridge chip. Otherwise I could try to check and confirm that was the problem. -Doug
