Tvheadend

Hi,

I've got problems accessing the DVB devices on my system. I've got 2 DVB-S sticks but after a certain amount of time tvheadend cannot tune into any channel...

2015-02-14 15:34:35.117 [WARNING]:linuxdvb: NXP TDA10071 : DVB-S #0 - poll TIMEOUT
2015-02-14 15:34:35.153 [WARNING]:linuxdvb: NXP TDA10071 : DVB-S #0 - retune nodata
2015-02-14 15:34:35.204 [ DEBUG]:linuxdvb: NXP TDA10071 : DVB-S #0 - status GOOD (SIGNAL | CARRIER | VITERBI | SYNC | SIGNAL)
2015-02-14 15:34:39.000 [ INFO]:mpegts: 12551.5V in Astra 19.2E - tuning on NXP TDA10071 : DVB-S #0

This is what I get...

Any hints if there's something I have to remember so that tvheadend can access dvbs devices at any time?

Greets
Sascha