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

[Linus Torvalds]

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?

                  Linus