I don't have the time to compile kernels, at the moment. But I tried latest CKT hwe kernel: Linux 5.11.0-16-generic #17~20.04.5-Ubuntu SMP Tue Apr 27 07:37:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
And hdmi is working like a charm.
I don't have the time to compile kernels, at the moment.
But I tried latest CKT hwe kernel:
Linux 5.11.0-16-generic #17~20.04.5-Ubuntu SMP Tue Apr 27 07:37:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
And hdmi is working like a charm.