Tvheadend

Hello,
my XBMCbuntu was already perfect. I was able to wake up the Zotac-machine from standy and it woke up for scheduled recordings. But since some days it did'tn work anymore. When the machine wakes from standby in the TVHeadend Webinterface no TV adapters are detected and in XBMC I get the response that no channel is assigned to service. After I reboot my Zotac everything is fine again. I reinstalled the latest drivers from Suntek for my DVB-C Stick but this didnt solve the problem.
Can anybody prevent me from reinstalling the complete system...?
Thanks for helping