Tvheadend

Hi,

My setup is:
DD Cine S2 + addon S2 (v6.0) = 4 s2 Tuners
All are connected to Quad Monoblock pointed at Hotbird 13e/Astra 19e, The Diseqc pos are A for hotbird and B for Astra.

Running on Ubuntu 1404, TVH v 4.1-1171~gaa13922.(also tried the stable 4.07)
Stock ddbridge drivers and also newly built according to endriss/media_build_experimental (taken from here: https://www.digital-devices.eu/shop/de/custom/index/sCustom/80 )

After Initial setup I noticed failed scans on certain Muxes.
After fiddling around I found that 2 of the tuners cannot tune to a number of muxes, mostly on Hotbird.

I have tried multiple settings (Diseqc, cable changing etc.). It remains so.

The tuners are enumerated 0...3, but that doesn't tell me anything about the actual HW being used.

I also rule out LNB/Cabling issues, since the same machine, when dual booted to Windows/DVBlink has none of these problems (i.e. all the muxes failing on TVH can be tuned to/used by all tuners in Windows)

Does anyone know of any issues with the CINE S2 HW in Linux vs. windows drivers? Firmware? any differneces known?
ANd why does it effect only 2 of 4 tuners? Is there a distinction between the tuners on the base card and the add on tuners?

Thx for any help/pointers
Cheers,