Certain cards are producing 'no signal' status with MyTV

I think it has something to do with the recent mpsa.ax changes.

h4. Steps to Reproduce
Hard to reproduce as not all cards do it.

1. Start MP MyTV
2. With Timeshifting on or off enter fullscreen
3. usually within 10 minutes sometimes alot earlier you get the pop-up.

If you change channel it does not bring TV back.
You have to reboot the PC for TV to be functional again.

h4. Additional Information
Frodo:
Since this is difficult to reproduce ( i cant at the moment)
I would like to know:
- is this happening with timeshift on/off or both?
- is this happening on FTA or scrambled channels or both?
- is this happening with a specific video/audio codec?
- which cards have this problem? (remember i got firedtv & twinhan)