ohai.

so I tried to start into "wayland" session but the option is not there
the only options are "Gonome on Xorg". "Gnome Classic" and "Ubuntu" - all three 
run xorg - no wayland.
$ echo $XDG_SESSION_TYPE
x11

None of these three can run a joined display. Mirror (2 x 1080p) works well.
Also Extending the screen when running the screen in non-native (1080p) works. 

so I started experimenting - used a different hdmi cable (1.4 with ethernet) 
but same
also used a HDMI to DP adapter and connected that - nothing. 
then I tried running the screen as a "single" display - that also failed,

Now, I am running the proprietary nvidia driver (so I can switch intel
and nvidia, I think it's called PRIME) - I switched to Intel only but
same. Can't run the screen in QHD resolution, be it joined or single.

UPDATE 26 April

updated to Ubuntu 20.04 and still same. 
mirror and joined works in xorg and wayland (same)
but the screen does not work in QHD (2560x1440) in either display manager and 
not as "single display" either. 
both in "intel only" and "nvidia" mode. (prime)
using proprietary driver I can choose. nouveau does not allow me to chose, also 
doesn't work in QHD.

anything I can do to help?

cheers and thanks for all the work


Andreas

Andreas

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https://bugs.launchpad.net/bugs/1872164

Title:
  qhd (joined) via hdmi 1.4 not working

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