It seems to be a common issue but I could not find a solution.
- just clean installed Ubuntu 20.04 Desktop and updated it with the "Software & updates" tool.
- PC:HP ProDesk 400 G4 Desktop-Mini-PC
- The monitor attached on one of the DisplayPort ports: HP EliteDisplay E243
- Video card (
lspci -k | grep -A 2 -i "VGA"
) :
00:02.0 VGA compatible controller: Intel Corporation 8th Gen Core Processor Gaussian Mixture Model
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company 8th Gen Core Processor Gaussian Mixture Model
- output of command seen on other related questions/answers :
xrandr --query
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-3 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
1920x1080 60.00
1600x1200 60.00
1680x1050 59.95
1280x1024 60.02
1280x960 60.00
1024x768 60.00
800x600 60.32
640x480 59.94
720x400 70.08
HDMI-3 disconnected (normal left inverted right x axis y axis)
- The configuration was working out-of-the-box on Windows 10 and Debian 10.
- I could not find anything obviously wrong in the
dmesg
output. - (edit) I also tried to change grub to add
nomodeset
it does not make any difference. - (edit) I tried switching to lightDM (and back to gdm, +reboot) but no difference noticed.
- (edit) I also did an update with
sudo apt update ; sudo apt upgrade
but no change. - (edit) I upgraded the kernel to the last stable (5.6.16) but without effect.
If some extra info is needed please let me know.