Comment 3 for bug 2042388

This sounds like something that might be fixed by this:
https://git.launchpad.net/~esmil/ubuntu/+source/linux-riscv/+git/mantic/commit/?id=86b8ae081f5e18f4d823453a5ae937f4a1fb16a4

That patch has made it to the 6.5 stable tree, but I don't think it's in any of our released kernels yet.
Any chance you could try this kernel:
https://esmil.dk/linux-riscv-6.5.0-9.9.2.tar.gz