Hi. I updated packages via Zorin Software today. After that the second monitor fell off, after xrandr --auto and several reboots the screen turned on, but all the colors are faded.
Changing the kernel and NVIDIA drivers did not help, even the open source driver did not help, I tried the hybrid mode and performance in the NVIDIA panel, also in the panel there is full RGB, as on the monitor itself. I tried changing to Weyland and xorg.
xrandr gives this error, with the command:
$xrandr --output HDMI-1-0 --set "Broadcast RGB" "Full"
warning: output HDMI-1-0 not found; ignoring X Error of failed request: BadRROutput (invalid Output parameter) Major opcode of failed request: 140 (RANDR) Minor opcode of failed request: 15 (RRGetOutputProperty) Serial number of failed request: 68 Current serial number in output stream: 68