When I'm watching tv on my MD (asrock ion330) and I hit F7 or try something fancy as PIP the playback slows down to a crawl...the system becomes very unresponsive....
Is this to be expected on an ion-plattform?
Also I have an issue with some movies....they sometimes freeze for a couple of seconds, then fastforwards to keep up again. I can rewind to the original place and watch normally. I think I have found out that when MythTV wasn't running before I watched, the videos play smoothly, no jerking.
Anyone else experienced something like that?
Are you running vdpau? Have you got the MythTV's CommFlagging turned on? Another candidate is MythFilldatabase...that can really hose your Core too. Any of these or some of them in parallel might cause video streams to hiccup as you describe.
All the best