IR remote stopped working in kernels built after Sep. 5 2020. Kernel 5.8.7 works. 5.8.8 and later don't. This also applies to ubuntu 5.4.0 kernels. Last one that worked was 5.4.0-48.Problem appears to be custom keymaps are not getting loaded. Not sure about the rest.
there's a patch on the way to fix this. Thanks to Sean young. ref: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1901089