Hi,
I am running Volumio on a Pi3b/HiFiBerry MiniAmP with a 7" touch display. For dsiplay calibration 3 lines have to added to /boot/config.txt:
hdmi_group=2
hdmi_mode=87
hdmi_cvt 1024 600 60 3 0 0 0
Trouble is that after each version update (present version 2.671) these