Have a layer that can be scanned out, and an invisible layer on top (CRTC_* describe a non-empty rectangle, but either the layer is disabled via FB_ID = 0 either it's completely transparent via alpha = 0).
libliftoff will prevent the bottom layer from being scanned out because of the check in has_composited_layer_over.
Have a layer that can be scanned out, and an invisible layer on top (
CRTC_*describe a non-empty rectangle, but either the layer is disabled viaFB_ID = 0either it's completely transparent viaalpha = 0).libliftoff will prevent the bottom layer from being scanned out because of the check in
has_composited_layer_over.