Comment 45 for bug 1874217

I can verify the symptoms as described here with the nvidia 440.95.01 driver an Nvidia P620 card with three monitors (left and right monitors in portrait center in landscape.

I can use the Nvidia supplied GUI app nvidia-settings to configure three screens (using rotate left in the nvidia-settings configurator to get proper orientation) and press apply then everything works properly, though as previously pointed out those settings are lost during login. When configuring with the Ubuntu Settings Display dialog I must use portriat rotate-right to get the correct orientation (along with the improperly scaled viewport).

For those with two monitors, if you put the portrait monitor on the left of the landscape monitor the ubuntu settings program generates the correct result (at least for me).

I'd be willing to install the nvidia 450 driver directly if I believe the problem would go away but I've not hear anyone say that's true.