Another issue in my case is, that nearly every time the system wakes up from S3 by the wakeup timer, I've got a black screen - recordings are well, but I do not have anything on the screen, so I'll have to wait until the next suspend and wake up the system manually. When I wake it up manually or by WOL the screen is never(!) black - just by automatic wakeup! Interesting is, that not only there is no signal on the TV output, even remote software like Radmin shows a black window - maybe that helps to detect the problem.