On Mon, Jan 10, 2022 at 5:05 PM Daniel Vetter <daniel.vetter@xxxxxxxx> wrote: > > On Mon, Jan 10, 2022 at 10:30 PM Linus Torvalds > <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > On Thu, Jan 6, 2022 at 10:12 PM Dave Airlie <airlied@xxxxxxxxx> wrote: > > > > > > git://anongit.freedesktop.org/drm/drm tags/drm-next-2022-01-07 > > > > Gaah. I merged things and it built cleanly, and I pushed it out. > > > > But then I actually *booted* it, and that's not pretty. > > > > It *works", but it's almost unusable because of random scanline > > flickering. I'm not sure how to explain it, but it's as if there > > wasn't quite enough bandwidth on the scan-out, so you get these lines > > of noise and/or shifted output. They are temporary - so the > > framebuffer contents themselves is not damaged (although I don't know > > how the compositor works - maybe the problem happens before scanout). > > > > This is on the same Radeon device: > > > > 49:00.0 VGA compatible controller: Advanced Micro Devices, Inc. > > [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev e7) > > > > with dual 4k monitors. > > > > Any idea? Sounds like something related to watermarks. That said, we haven't really touched the display code for DCE11 cards in quite a while. Can you provide your dmesg output? Alex > > Since Christian is mostly the compute/memory side, adding some display > folks for this. > -Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > http://blog.ffwll.ch
