DRM backend does not buffer support modifiers for composition bypass
Submitted by Eero Tamminen
Assigned to Wayland bug list
Recent Weston (git) versions composite fullscreen applications. The gfx stack that I'm using, supports modifiers and atomic mode setting in case that matter.
This didn't happen with last year Weston version (with a gfx stack that didn't yet have support for modifiers or atomic modesetting), so this is a (performance & power usage) regression.
This is on Intel HW (Broxton, Skylake...).