With Impish Indri we brought support for the Raspberry Pi Sense HAT to Ubuntu (along with Dave Jone’s nifty Sense HAT desktop emulator).
We want to continue expanding the number of HATs we support going forward so let us know what HATs you’d like to see in future and what projects they would enable 
Personally I’d like to see more audio support, could do with a set of wifi speakers… 
Personally I’d like to see more audio support, could do with a set of wifi speakers…
+1.
I too would like to see more audio support.
My Hifiberry DAC board stopped working with Indri on RPi4. The same hardware runs 20.04 and plays audio just fine.
I haven’t been able to do too much digging, but have enabled overlay debugging and didn’t see anything relevant in dmesg or journalctl.
do you know if support for i2c cards is planned?
There was a recent change to break out some kernel modules into an -extra package, which could be the reason that it suddenly stopped working. Could you try running sudo apt install linux-modules-extra-raspi on your Impish Indri installation?
That’s worth a try. Thanks for the tip!
I will report back this weekend.