I have a Ubuntu 20.04 system,.. with all the latest updates,.. as a base for a mythtv 0.31 system. with a recent upgrade,.. to a quad TBS6904,.. and an old TBS6285,.. (previously I had a 2 channel SAT card 6982) so two cards installed on PCI bus , 6904 and 6285. The cards appear to be working,.. wel...