Hi and thanks for Librelec (and openelec).
I'm using this cheap tuner from ebay -
on x86 Libreelec, it's recognized by tvheadend (can see all 3 tuners available, including dvb-c).
If i use DVB-C i can scan and find channels but there is an insane amount of continuity errors. practically un watchable.
I've tried on 2 seperate machines - a gigabyte brix and a lenovo small form factor computer, both with the latest stable librelec release from the download section.
I've also tried these as well just in case LibreELEC (unofficial) Kodi builds for additional DVB Drivers
In case it was the tuner itself, i installed progdvb on my windows laptop and tried there - worked perfect, flawlessly.
I use an ubuntu server with tvheadend and a TBS6909 so i decided to try the stick in there to see if it's a linux issue or librelec/drivers/tvheadend.
Unfortunately i couldn't get it working at all - posted here if interested (as this guy used the same stick as an example) - otherwise ignore it > howto: ubuntu 16.04 Tvheadend DVB-C/S(2)/T & non-DVB (ipcam/DV) rotate recording
I'm willing to donate 30$ to get this working on Librelec (no stutter).