possible bug with RDNA4 and AMS

[Alex Deucher]

On Mon, Apr 21, 2025 at 5:43 AM Malte Schröder <malte.schroeder at tnxip.de> wrote:
>
> Hi,
>
> finally found this list, I hope it's the right place for this. I
> recently swapped my trusty RX 6900 XT with a shiny new RX 9070 XT (aka
> RDNA2 to 4). Now, when I start kwin_wayland my desktop is a flickering
> mess. As a workaround I can set KWIN_DRM_NO_AMS, it is working with
> this. Afaik this disables the use of atomic mode setting. So I guess
> there is a bug in either amdgpu kernel side, libdrm or mesa.
>
> Versions are kernel 6.15-rc2 + drm-fixes-6.15, libdrm is from git
> (2.4.124 fdf384d4), mesa is 25.1-rc and kwin is 6.3.4.
>
> I am happy to provide debug, but I need some guidance to it.

Please file a bug here:
https://gitlab.freedesktop.org/drm/amd/-/issues/
and attach your dmesg output.

Alex

>
>
> Regards
>
> Malte
>