Tvheadend

It sounds to me like TVHeadEnd is crashing for some reason but I can't tell you why. Also what version of TVHeadEnd are you running? If it's an older version (3.x branch) you may want to consider upgrading. Also if you look at the TVHeadEnd log it may give you some indication of what happening.

I assume when you say you are going to localhost:9981 that TVHeadEnd is running on the same machine that you are using, right? And that you haven't created or modified any rules in the Access Entries tab that would block TVHeadEnd from being accessed from the same system? If you create a rule that allows access from the local network but don't explicitly include a rule to allow 127.0.0.1/32 (which is localhost) you may actually block access from the machine that TVHeadEnd runs on but not from other machines on your local network. I have to use a rule of the form 192.168.10.0/24,127.0.0.1/32 to allow access from both my local network and from the system that TVHeadEnd runs on.

i think i found a solution on another forum. dont know for how long it works.

i made a startup.sh file
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#!/bin/bash
transmission-gtk --minimized &
sleep 5s; sudo service tvheadend restart
exit 0