I have followed the instructions from https://www.dedoimedo.com/computers/rpi4-ubuntu-mate-hw-video-acceleration.html
but I can only get Okey from
cat /proc/device-tree/soc/firmwarekms@7e600000/status
and this one shows not found
cat /proc/device-tree/v3dbus/v3d@7ec04000/status
I can’t get hardware acceleration in Chromium. Please help.