compositor-drm: Force DPMS state to ON after drmModeSetCrtc()
compositor-drm: Force DPMS state to ON after drmModeSetCrtc()

The kernel is supposed to set this when drmModeSetCrtc() is called but
at least the i915 driver wouldn't do that in all cases. A fix for this
should be released with kernel 3.10, but we work around the issue in
older kernels by always forcing DPMS to ON when doing a mode set.

https://bugs.freedesktop.org/show_bug.cgi?id=64873

eyolfson/weston,Gnurou/weston,udoprog/weston,xorgy/weston,sir-murray/weston,udoprog/weston,kwm81/weston,krezovic/weston,Fantu/compositor-spice,giucam/weston,giucam/weston,eyolfson/weston,kwm81/weston,sir-murray/weston,xorgy/weston,jonnylamb/weston,mchalupa/weston,Tarnyko/weston-xdg_surface_present,Fantu/compositor-spice,mchalupa/weston,jonnylamb/weston,Tarnyko/weston-xdg_surface_present,Gnurou/weston,Fantu/compositor-spice,krezovic/weston