Hi,
OK thanks for the information.
I think I got the reason. I removed the KVM switch between the RockPi and the monitor. With that after the yellow stripes the normal screen appears.
Don’t know why this is a problem began showing with bullseye.
I will setup the system to my normal setup and will check if I will get the same panfrost errors here. Problem is when the panfrost page faults occur my running VoiP session (via Twinkle oder Linphone) is broken and I have to redial.
But I think this ticket/issue here can be closed.
Thanks.
Regards.