Using XBMC - During playback of videos, it randomly stops playback, but can't do anything with XBMC. I can minimize XBMC and everything else works and I can bring up title bars etc on XBMC but it appears as if XBMC is paused, but not actually paused. Then it resumes playing again. I have tried a lot of suggestions like turning uPnP off.
Not sure if this is the same issue, but worth a try.
Im running XBMC Live, connected via HDMI to an Onkyo 607. Every now and again (but randomly), the HDMI feed would drop with the TV showing 'no signal'.
I managed to fix this by changing the Video settings in XBMC to run in Fullscreen - it was originally set windowed but with fullscreen resolution. It appeared as if some type of screen saver was kicking in every few minutes.
This was when the server was booting directly into XBMC. Since then, ive re-configured it to boot into fluxbox, and then start XBMC - not sure if this is an option for you.