HDMI CEC stopped working after Matrix update on the RasPi 3 B

[fzinken]

@leonelsr

Side note: dispmanx_vncserver stopped working as well even after full uninstall and reinstall, but I understand I shall ask about it on the existing VNC topic, or create a new one…

VNC would only work with the fkms driver which is not recommended to be used.

[HowTo] Install a vnc server on the Raspberry pi

The following works for me. in /boot/config.txt, change the line dtoverlay=vc4-kms-v3d,cma-512 to dtoverlay=vc4-fkms-v3d,cma-512 Set the resolution to maximum 1080p. I have no idea if kms/fkms breaks anything else or e.g. affects performance. For higher resolutions than 1080p I fail to get a snapshot, and need to do a hard reboot to get it working again.