Having this as well, Ubuntu 22.04.2 LTS, 5.15.0-1030-gke. Firefox and Chrome rendering garbage.
Maybe this is helpful - a difference I noticed in the output of chromium when run without and with the --disable-gpu flag is that, when run without it there is a log line
amdgpu: os_same_file_description couldn't determine if two DRM fds reference the same file description.
while when run with --disable-gpu this line is not present.
Having this as well, Ubuntu 22.04.2 LTS, 5.15.0-1030-gke. Firefox and Chrome rendering garbage.
Maybe this is helpful - a difference I noticed in the output of chromium when run without and with the --disable-gpu flag is that, when run without it there is a log line
amdgpu: os_same_ file_descriptio n couldn't determine if two DRM fds reference the same file description.
while when run with --disable-gpu this line is not present.