I have 2 external monitors that support a resolution up to 3440x1440 (and a laptop screen of 1920x1080) and a Lenovo ThinkPad Thunderbolt 3 Dock Gen 2. While having one external active monitor at 3440x1440 and the laptop screen works, I cannot use both screens at the same time at its maximal resulution. The best setup I can achieve at the moment is the following:
$ xrandr Screen 0: minimum 320 x 200, current 4480 x 2160, maximum 16384 x 16384 eDP-1 connected primary 1920x1080+1576+1080 (normal left inverted right x axis y axis) 309mm x 173mm 1920x1080 60.01*+ 59.97 59.96 59.93 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 59.99 59.94 59.95 59.82 1280x1024 60.02 1440x900 59.89 1400x900 59.96 59.88 1280x960 60.00 ... DP-2-1 connected 2560x1080+0+0 (normal left inverted right x axis y axis) 797mm x 333mm 3440x1440 49.99 + 59.97 2560x1440 59.95 2560x1080 60.00* 59.94 1920x1080 60.00 50.00 59.94 1680x1050 59.88 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.90 1280x800 59.91 ... DP-6 connected 1920x1080+2560+0 (normal left inverted right x axis y axis) 797mm x 333mm 3440x1440 59.97 + 49.99 2560x1440 59.95 2560x1080 60.00 59.94 1920x1080 60.00* 50.00 59.94 1680x1050 59.95 1600x900 60.00 1280x1024 75.02 60.02 1440x900 59.89 1280x800 59.81 ...
I cannot set a higher resolution for either of the two monitors. For example, when trying to set 2560x1080 for DP-6 I get the following error:
$ xrandr --verbose --output DP-6 --mode 2560x1080 screen 0: 5120x2160 1355x572 mm 95.92dpi crtc 1: 2560x1080 60.00 +2560+0 "DP-6" xrandr: Configure crtc 1 failed crtc 0: disable crtc 1: disable crtc 2: disable screen 0: revert crtc 0: revert crtc 1: revert crtc 2: revert
The following does not work either: 2x 3440x1440, 2x 2560x1440, 2x 2560x1080. Even when turning the laptop monitor off and only having both external monitors, none of these higher resolution setups works. The best I could achieve is the setup shown in the
xrandr output above. But that kinda destroys the purpose of one of the ultra wide screens, being stuck at a stretched 1920x1080 (while the second monitor being at 2560x1080 is OK). Why can't I set any higher resolution? I wished to have at least both at a 21:9 resolution of 2560x1080. Any ideas how to achieve that?
Laptop: Lenovo T480 OS: Ubuntu 18.04.4 LTS Kernel: 5.3.0-40-generic Graphics Card: Intel Corporation UHD Graphics 620 Monitor Connections: HDMI or DP