Hi Audieniek,
thank you for your fast reply. I just tried the original Octagon 1028P software from 2017 and found that it allows me to tune in to DVB-T2 channels! So I seems I have the "newer" variant of the Sony CXD2820 tuner - sometimes this is possibly referred to by CXD2820R (https://www.linuxtv.org/wiki/index.php/Sony_CXD2820). The latter link also refers to open source Linux drivers but I'm not sure it helps. Do you have a link to Bpanther's Neutrino images?
(The situation is that I am located in Denmark where more and more channels are moved from the DVB-T to the DVB-T2 standard, so this is why I'm interested in receiving the DVB-T2 channels. In the worst case, I have to move back to the original Octagon software or buy a new receiver.)
The other issue I mentioned is that with your build of the atevio7500 image, the DVB-S tuner does not allow me to tune in to vertically polarized channels on Astra 19E - which works with the latest HDMU image, though. I know I am demanding a lot, but can you reproduce this issue with your DVB-S tuners on the Octagon/Fortis?