Small observational update
When I rebooted my Mac, the displaylink monitor went back to the same behavior of only one resolution on rotation.
When I unplugged the displaylink adapter from the usb hub and then plugged it back in (a different port, don't know if makes a difference), it suddenly recognized the displaylink monitor and had it set to the correct rotated resolution automatically.
It was literally two weeks before I had to reboot my Mac so didn't observe this behavior before.
Sang
|