désolé je suis sur une iso (téléchérgé aujourd'hui) mais je n'ai pas ce "rectangle" je ne peux rien dire de plus
kubuntu@kubuntu:~$ uname -a
Linux kubuntu 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
kubuntu@kubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
kubuntu@kubuntu:~$
j'ai deux écrans 1920x1080 un en hdmi l'autre en vga
kubuntu@kubuntu:~$ xrandr
Screen 0: minimum 320 x 200, current 3000 x 1920, maximum 16384 x 16384
HDMI-1 connected primary 1920x1080+1080+840 (normal left inverted right x axis y axis) 544mm x 303mm
1920x1080 60.00*+ 74.97 50.00 59.94
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 74.98 59.90
1280x960 60.00
1152x864 75.00
1280x720 60.00 50.00 59.94
1152x720 59.97
1024x768 75.03 60.00
832x624 74.55
800x600 75.00 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-1 connected 1080x1920+0+0 left (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.00*+
1600x1200 60.00
1680x1050 59.95
1280x1024 75.02 60.02
1440x900 59.89
1280x960 60.00
1152x864 75.00
1152x720 59.97
1024x768 75.03 60.00
832x624 74.55
800x600 75.00 60.32
640x480 75.00 59.94
720x400 70.08
HDMI-3 disconnected (normal left inverted right x axis y axis)
kubuntu@kubuntu:~$
