Well, I started my EPIA project with a SkyStar2 Rev. 2.6c about a year ago and replaced the card after 3 months by a NOVA-S for the same reason. About a year ago the driver had the problem that for any reason it didn't get any interrupts anymore and therefore no data for live TV. Reloading the drivers fixed the issue but was anoying.
As I said in my reply to Tony, I do not need to reload my drivers. After reloading vdr, everything works ok. So it seems more of the EPG timeout problem you mentioned in your other post.
IIRC, the driver was under havy development (rewrite?) over the year, but it seems that the version in 2.6.13 still has problems. Try multiple
cat /proc/interrupts
to see, whether the device generates any interrupts when it has reached the NO SIGNAL state.
I'll do that.
Another idea: could it be a temperature issue which lets the device freeze at some point so that only a reset (= reloading of drivers) can force it back to life?
No, I don't need to reload, and as far as I know, temperature is very low inside the case. I've tried it on the back of the card, but I've never felt high temperature there.
Best,
Maarten