possible bug with RDNA4 and AMS

[Michel Dänzer]

On 2025-04-20 21:38, Malte Schröder 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.

FWIW, if it's a user-space issue, it's most likely in kwin. Mesa doesn't use KMS directly in this scenario, and libdrm is just a thin wrapper around KMS ioctls.


-- 
Earthling Michel Dänzer       \        GNOME / Xwayland / Mesa developer
https://redhat.com             \               Libre software enthusiast