Use a timer for unreferencing the all-black FB

The timer fires 1 second after LeaveVT. This gives the next DRM master
enough time to set up scanout of its own buffers.

Fixes prolonged intermittent black screen when switching from Xorg to
e.g. the GDM Wayland mode login VT.

Fixes: c16ff42f927d ("Make all active CRTCs scan out an all-black
                      framebuffer in LeaveVT")
(Ported from radeon commit 9d9c565c84601f4c6c73ad769f86491088683f7a)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions