Re: [git pull] drm for 5.17-rc1 (pre-merge window pull)

[Daniel Vetter]

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?

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