amdgpu 4k at 120Hz / HDMI 2.1

[Michel Dänzer]

On 2024-12-31 13:42, Mischa Baars wrote:
> 
> In the meantime I also checked the framerate synchronization through
> glxgears at different resolutions and framerates. This does function
> as expected. Although I haven't yet inspected the glxgears source
> codes in detail, the OpenGL double buffering must be functional up to
> some level. This means that the problem must be confined to GTK and
> the GtkGLArea widget. Using GDK_BACKEND=x11 I do get a double buffered
> context, but the default buffer does not alternate between GL_FRONT
> and GL_BACK.

Yeah, that's not how double-buffering works in GL. The draw buffer is always GL_BACK, SwapBuffers doesn't affect that (it just may internally change which actual buffer GL_BACK refers to).

I don't see more context about the issue you're investigating, any pointers?


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