Re: que dit xrandr ?

Screen 0: minimum 16 x 16, current 4480 x 1440, maximum 32767 x 32767
XWAYLAND0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 170mm
 1920x1080 59.96*+
 1440x1080 59.99 
 1400x1050 59.98 
 1280x1024 59.89 
 1280x960 59.94 
 1152x864 59.96 
 1024x768 59.92 
 800x600 59.86 
 640x480 59.38 
 320x240 59.52 
 1680x1050 59.95 
 1440x900 59.89 
 1280x800 59.81 
 720x480 59.71 
 640x400 59.95 
 320x200 58.96 
 1600x900 59.95 
 1368x768 59.88 
 1280x720 59.86 
 1024x576 59.90 
 864x486 59.92 
 720x400 59.55 
 640x350 59.77 
XWAYLAND1 connected primary 2560x1440+1920+0 (normal left inverted right x axis y axis) 600mm x 340mm
 2560x1440 59.91*+
 1920x1440 59.90 
 1600x1200 59.87 
 1440x1080 59.87 
 1400x1050 59.86 
 1280x1024 59.76 
 1280x960 59.94 
 1152x864 59.78 
 1024x768 59.68 
 800x600 59.86 
 640x480 59.38 
 320x240 59.52 
 1920x1200 59.88 
 1680x1050 59.85 
 1440x900 59.89 
 1280x800 59.81 
 720x480 59.71 
 640x400 59.20 
 320x200 58.96 
 2048x1152 59.90 
 1920x1080 59.88 
 1600x900 59.82 
 1368x768 59.88 
 1280x720 59.86 
 1024x576 59.90 
 864x486 59.45 
 720x400 59.55 
 640x350 59.77 

Si je me trompe pas screen0 = écran du pc portable, screen 1 = l'écran qui fontionne.
Donc il manque le 2 ecran externe ... sauf que Gnome détecte un troisième écran dans les paramétres->2crans->liste déroulante