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I got two new WQHD screens today and have issues with adjusting the resolution. I tried setting the resolution via xrandr and via Gnome Control Center.

This is the output in journalctl -xef after executing sudo xrandr --output DP1-1 --mode 2560x1440 --left-of DP1-2

Mai 13 23:17:35 imanuel-inspiron sudo[8031]:  imanuel : TTY=pts/1 ; PWD=/home/imanuel ; USER=root ; COMMAND=/usr/bin/xrandr --output DP1-1 --mode 2560x1440 --left-of DP1-2
Mai 13 23:17:35 imanuel-inspiron sudo[8031]: pam_unix(sudo:session): session opened for user root by (uid=0)
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (II) intel(0): resizing framebuffer to 4480x1440
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (II) intel(0): switch to mode 2560x1440@60.0 on DP1-1 using pipe 1, position (0, 0), rotation normal, reflection none
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (EE) intel(0): failed to set mode: Invalid argument [22]
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (--) intel(0): HDMI max TMDS frequency 250000KHz
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (II) intel(0): resizing framebuffer to 3840x1080
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (II) intel(0): switch to mode 1920x1080@60.0 on DP1-1 using pipe 1, position (0, 0), rotation normal, reflection none
Mai 13 23:17:35 imanuel-inspiron /usr/lib/gdm-x-session[1121]: (II) intel(0): switch to mode 1920x1080@59.9 on DP1-2 using pipe 0, position (1920, 0), rotation normal, reflection none

And here is the output of xrandr

Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
eDP1 connected (normal left inverted right x axis y axis)
   1920x1080     60.01 +  59.93    48.00  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
   1600x900      60.00    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1368x768      60.00    59.88    59.85  
   1280x800      59.81    59.91  
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   640x360       59.84    59.32    60.00  
DP1 disconnected (normal left inverted right x axis y axis)
DP1-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
   2560x1440     59.95 +
   1920x1080     60.00*   50.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
   2560x1440_60.00  59.96  
DP1-2 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 600mm x 340mm
   2560x1440     59.95 +
   1920x1080     60.00    59.94* 
   1680x1050     59.95  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      59.89  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
   2560x1440_60.00  59.96  
DP1-3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

I am using an USB-C Dell Dock15.

The screens I want to use are DP1-1 and DP1-2.

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