For users running openatv 6.3 and 6.2 with Linux kernel 5.3.0 i've been working with a dev with the fix that he's diligently tweaking.If you aren't concerned about blind scan accuracy, I've got cases of Mio+ STBs to sell today...
Unknown when this will be resolved as this is an issue that the tuner manufacturer is working on.
He's compiled it for both the mio4k and 4k+. It's not out for general release yet or to be incorporated in images. But it works. On 105W I was able to blindscan and pick up 3128 channels with the latest 6.3. I think the hold up is possible dupes being picked up and lower sr issues. But I haven't seen any. For users who can use the terrestrial/cable tuner he has that working too. But (bummer and for reasons I cannot fathom) "over here" that tuner is just an unused jack in the back. I'll check and see if he will allow me to post the link.
For reference we started at version 1 and are now up to ver. 10.
If the H7.AC wasn't such a disaster!