Tvheadend

I suffered the same problem because I had 2 USB DVB-T tuners and a quad-port DVB-S tuner and the ordering just depended on how things were initialised at boot. My solution was to fix the adapter numbers for the drivers so that after reboot, the cards were always mapped to the same /dev/dvb/adapterX

Here's some examples: http://ubuntuforums.org/archive/index.php/t-1311795.html

Some USB adapters can be set through /etc/modprobe.d/options-dvb.con as this article. Some don't support the adapter_nr parameter, though, so you have to use udev instead.

http://www.mythtv.org/wiki/Device_Filenames_and_udev

If you're lucky, you can set enough of the tuners through adapter_nr that the others initialise in the right place every time. I never personally had much luck with udev...

Based on the tutorial mentioned by Prog Yaffle, I have created in /etc/udev/rules.d/10-local.rules like this:

peter@TvHeadend:~$ cat /etc/udev/rules.d/10-local.rules

1. Terratec Synergy
   SUBSYSTEM=="dvb", KERNEL=="dvb[0-9].frontend0", ATTRS{subsystem_vendor}=="0x153b", ATTRS{subsystem_device}=="0x1178", SYMLINK+="Terratec_Synergy"
2. Technisat CableStar
   SUBSYSTEM=="dvb", KERNEL=="dvb[0-9].frontend0", ATTRS{subsystem_vendor}=="0x1ae4", ATTRS{subsystem_device}=="0x9800", SYMLINK+="Technisat_Cablestar"
3. Technisat Skystar UBS 2 HD
   SUBSYSTEM=="dvb", KERNEL=="dvb[0-9].frontend0", ATTRS{subsystem_vendor}=="0x1043", ATTRS{subsystem_device}=="0x8179", SYMLINK+="Technisat_Skystar"

The rules are not applied, where am I going wrong ?