Thanks. Weird that the Nvidia Xorg driver mentions the correct
dimensions:

Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (II) 
NVIDIA(0): Computing DPI using physical size from LG Electronics LG
Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (II) 
NVIDIA(0):     ULTRAWIDE (DFP-3)'s EDID and first mode to be programmed
Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (II) 
NVIDIA(0):     on LG Electronics LG ULTRAWIDE (DFP-3):
Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (II) 
NVIDIA(0):   width  : 5120 pixels  1200 mm (DPI: 108)
Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (II) 
NVIDIA(0):   height : 1440 pixels  340  mm (DPI: 107)
Dez 19 16:13:57 thelittleerik-pc /usr/libexec/gdm-x-session[3574]: (--) 
NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config

and yet xrandr gets it wrong with "1mm x 1mm". I can't yet tell if it's
the Nvidia driver or Xorg itself causing the bug.

** Changed in: xorg-server (Ubuntu)
       Status: Incomplete => New

** Also affects: nvidia-graphics-drivers-550 (Ubuntu)
   Importance: Undecided
       Status: New

** Summary changed:

- The login problem is still not fixed, I'm using an ultrawide monitor 
5120x1440 and ubuntu defaults the first login screen to 400% 
+ [nvidia] First login uses scale 400% because xrandr reports the screen is 1mm 
x 1mm

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https://bugs.launchpad.net/bugs/2091237

Title:
  [nvidia] First login uses scale 400% because xrandr reports the screen
  is 1mm x 1mm

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