NOK: 20.04, i1Display3:
gnome-control-c[22782]: calibration failed with code 1: no sensor->get_sample
workaround: using https://displaycal.net/ -> deb from 19.10 (no 20.04 up top now)
selecting the profile ~/.local/share/icc/DELL U2711 #1 2020-06-09 23-26 2.2 F-S XYZLUT+MTX.icc
NOK: 20.04, i1Display3: c[22782] : calibration failed with code 1: no sensor->get_sample
gnome-control-
workaround: using https:/ /displaycal. net/ -> deb from 19.10 (no 20.04 up top now) share/icc/ DELL U2711 #1 2020-06-09 23-26 2.2 F-S XYZLUT+MTX.icc
selecting the profile ~/.local/