Hi I'm new to the forum. I have tried search for my problem using different key words but could not find an answer. I have a new install of TVheadend on new install Xubuntu. TVH finds HDhomerun but not PCI or PCIe tuner cards. The cards are found by "Digital TV Setup" which is able to tune channels, so (to me) that meant the required firmware drivers are installed. Just in case I also followed the Haupauge instructions for driver/firmware download but that made no difference. Any suggestions on how to get the cards seen by TVH welcome. Thanks

What is "Digital TV Setup"?

Hard to help without knowing what the cards are. If you could provide the output from the dmesg command, preferably immediately after boot. Also the output of lspci -vvv. Kernel version output of uname -a command.
"Digital TV Setup" occupied tuners, that's why.
Thank you both (Ron L and saen acro)for taking the time to consider my problem
At the moment I'm not able to provide the dmesg output.
While waiting for a reply I continued with my testing and after installing Ubuntu on 20.04 rather than Xubuntu, Tvheadend found the tuners. As far as I know (I do take install notes) I didn't do anything any different with the install on Ubuntu except the version of Tvheadend installed on Ubuntu was done via the system software download GUI (TVH 4.2.8) whereas the Xubuntu install was via Terminal (not being available via via the installer) and from my notes that was 4.3.* which I now realise is not a stable release (sorry I didn't note my route to that version)
Regarding the suggestion"Digital TV Setup" occupied tuners , that couldn't have been the issue in this case (though I understand how you could come to that conclusion given the limited detail I had given) because the problem was present before I installed Digital TV Setup, which I did to see if that could find the tuners. I will mark this as solve now.