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What is the output of:

lsb_release -a; uname -a; xrandr

Thanks

administrator@administrator-Galago-UltraPro:~$ lsb_release -a; uname -a;
xrandr
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 16.04.4 LTS
Release:    16.04
Codename:    xenial
Linux administrator-Galago-UltraPro 4.4.0-116-generic #140-Ubuntu SMP
Mon Feb 12 21:23:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis
y axis) 309mm x 173mm
    1920x1080     60.05*+  59.93
    1680x1050     59.95    59.88
    1600x1024     60.17
    1400x1050     59.98
    1600x900      60.00
    1280x1024     60.02
    1440x900      59.89
    1280x960      60.00
    1368x768      60.00
    1360x768      59.80    59.96
    1152x864      60.00
    1280x720      60.00
    1024x768      60.00
    1024x576      60.00
    960x540       60.00
    800x600       60.32    56.25
    864x486       60.00
    640x480       59.94
    720x405       60.00
    640x360       60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 connected 1920x1080+1920+0 (normal left inverted right x axis y
axis) 477mm x 268mm
    1920x1080     60.00*+  50.00    59.94    59.99
    1920x1080i    60.00    50.00    59.94
    1600x1200     60.00
    1680x1050     59.88
    1280x1024     75.02    60.02
    1440x900      59.90
    1280x960      60.00
    1366x768      59.79
    1152x864      75.00
    1280x720      60.00    50.00    59.94
    1024x768      75.08    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
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
administrator@administrator-Galago-UltraPro:~$

On 03/12/2018 10:47 AM, actionparsnip wrote:
> Your question #665515 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/665515
>
> Status: Open => Needs information
>
> actionparsnip requested more information:
> What is the output of:
>
> lsb_release -a; uname -a; xrandr
>
> Thanks
>

May help
https://askubuntu.com/questions/472262/adapt-ubuntu-to-a-high-dpi-resolution-screen