There are 67 1-star reviews for this receiver on Amazon. Most are for HDMI issues.
Have you tried running Coreelec on the Pi4 ?
Thanks blueribb but, I dont think this is related to the same HDMI issues. Coreelec is for AMlogic devices, not for Pi4, so no
I did istall the latest nightly 9.80-nightly-20190928-019132b and now the screen stays on when I switch to 2160p, but the TV is not changing resolution from 1080p to2160, resulting in an very blown up picture there I only can see the 1/4 of the gui, (upper left part)
Did SSH into the Pi, to see if the Pi could see the TV, and by running "tvservice -n" it reported back "device name=SNY-SAMSUNG" So the Pi can "see" the TV.
I will do some more testing, but hopefully I'm not the only one with this issue.
This is the modes that currently is reported back by tvservice.
# tvservice -m CEA
Group CEA has 18 modes:
mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive
mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive
mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive
mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced
(prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive
mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive
mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive
mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced
mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive
mode 33: 1920x1080 @ 25Hz 16:9, clock:74MHz progressive
mode 34: 1920x1080 @ 30Hz 16:9, clock:74MHz progressive
mode 93: 3840x2160 @ 24Hz 16:9, clock:297MHz progressive
mode 94: 3840x2160 @ 25Hz 16:9, clock:297MHz progressive
mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz progressive
mode 98: 4096x2160 @ 24Hz unknown AR, clock:297MHz progressive