[Meindert]

It is not XBMC because also a recoding fails and that has nothing to do with XBMC. But it seems, after some experiments, that the channels on ASTRA 3 gives occasionally problems both SD and HD. Often the problems occur after restart or after some configuration in TVHeadend. It is hard to pinpoint this.
My CPU is not the problem I think: Intel® Core™2 Duo CPU E8200 @ 2.66GHz

I play around with Priority, because i like to have the first adapter available for Astra2 and Hotbird

TVHeadend uses the adapters also for scanning ?! Is it possible to prevent this ? It is useles i think.

I'm worry about the amount of Services, it is almost 4000.

My configuration is 2 x TBS6981, so 4 tuners in total.
I have 4 networks configured: Astra1 (Quad LNB), Astra2 (Single LNB), Astra3 (Quad LNB) and Hotbird (Single LNB)
Tv Adapaters are:
Conexant CX24117/CX24132 #0 (Four port switch) Priority 20
AA: Astra1, AB: Astra2, BA Astra3, BB: Hotbird
Conexant CX24117/CX24132 #1 (Two port switch) Priority 10
A: Astra1, B: Astra3
Conexant CX24117/CX24132 #2 (Two port switch) Priority 15
A: Astra1, B: Astra3
Conexant CX24117/CX24132 #3 (Two port switch) Priority 5
A: Astra1, B: Astra3