that combo is already tested, reported in my comment above yours. Neither that
deathsimple xbmc-test branch nor the xbmc-nightly ppa have had any updates
since I ran that test. (That "Rainer's amd branch" referred to is the
xbmc-nightly ppa, which is still showing the same version as the one I tested
then.)

Reminder: It cured the second or so of full-screen glitch at the start of
playback, but not the ongoing loopiness.