Direct scanout sometimes failes, likely in connection with "meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0' failed"
I have one system where this happens quite reliably when running weston-simple-dmabuf-feedback
- the scanout tranche is send, but direct scanout does not work. Each time Mutter logs the line from the title:
meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0' failed