I've been using this card with MediaPortal in Windows for a while and it's been working fine.
Recently I've been testing TVHeadend and Linux, using the same machine and card, just dual booting operating systems. Using Ubuntu 15.10 server.
uname -a:
Linux slemmehtpc 4.2.0-19-generic #23-Ubuntu SMP Wed Nov 11 11:39:30 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
What I notice is that the signal quality seems to be less under Linux, causing slight problems and some continuity errors.
Under Windows using MediaPortal I see both signal level and quality around 95, while under Linux I see signal levels at 83-85 and SNR at 55-58. See attached screenshots.
Both systems are using the latest drivers from your download site - and I'm using DVB-C.
Any suggestions on how to improve the Linux driver quality?