Git rev: master/59d93693bf24e02ca0f05fe06d96a46f4f0f1bf8 Image location: https://autobuilder.yocto.io/pub/releases/yocto-3.4_M1.rc1/machines/beaglebone-yocto/ When the monitor enters power save mode or wakes up, some drm error messages are printed to the console: root@beaglebone-yocto:~# [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:32:tilcdc crtc] flip_done timed out [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:34:HDMI-A-1] flip_done timed out root@beaglebone-yocto:~#[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:31:plane-0] flip_done timed out tilcdc 4830e000.lcdc: already pending page flip!
This issue doesn't exist on 3.4 M2.
It seems that this has been fixed in the latest stable kernel.