Unix & Linux Asked by Ben Flowers on January 5, 2021
Im using Fedora 24 with 2 additional non HDPI dell monitors with my HDPI laptop (using thunderbolt 3 and daisy chaining the monitors with DP1.2)
I am trying to get the 3 monitors to display nicely with sizing. So far I’ve managed to get the laptop and 2nd monitor working correctly with the following command:
xrandr --output eDP-1 --auto --output DP-1-8 --auto --panning 3840x2400+3840+0 --scale 2x2 --right-of eDP-1
however I can’t seem to get the 3rd monitor to display anything useful, attempting with this command xrandr --output eDP-1 --auto --output DP-1-8 --auto --panning 3840x2400+3840+0 --scale 2x2 --right-of eDP-1 --output DP-1-1-8 --auto --panning 3840x2400+3840+0 --right-of DP-1-8
has resulted in the 3rd monitor tracking part of the second screen very zoomed in. I think I myust have the scale/panning off.
Can anyone help me get this set up corerctly?
see display setup below:
$ xrandr
Screen 0: minimum 320 x 200, current 7680 x 2400, maximum 8192 x 8192
eDP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 346mm x 194mm
3840x2160 60.00*+
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
1600x1200 60.00
1400x1050 59.98
1280x1024 60.02
1280x960 60.00
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
800x600 60.00 60.32 56.25
700x525 59.98
640x512 60.02
640x480 60.00 59.94
512x384 60.00
400x300 60.32 56.34
320x240 60.05
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-1-8 connected 3840x2400+3840+0 (normal left inverted right x axis y axis) 518mm x 324mm panning 3840x2400+3840+0
1920x1200 59.95*+
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1600x1200 60.00
1280x1024 75.02 60.02
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
DP-1-1-8 connected 3840x2400+3840+0 (normal left inverted right x axis y axis) 518mm x 324mm panning 3840x2400+3840+0
1920x1200 59.95*+
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1600x1200 60.00
1280x1024 75.02 60.02
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
DP-1-1-1 disconnected (normal left inverted right x axis y axis)
DP-1-1 disconnected (normal left inverted right x axis y axis)
xrandr --output eDP-1 --auto --output DP-1-8 --auto --panning 3840x2400+3840+0 --scale 2x2 --right-of eDP-1 --output DP-1-1-8 --auto --panning 3840x2400+
3840 +0 --right-of DP-1-8
Is that value correct? Your first screen will start at x = 0, second at x = 3840, and third at x = 3840 basically displaying same content as 2nd one.
Try:
xrandr --output eDP-1 --auto --output DP-1-8 --auto --panning 3840x2400+3840+0 --scale 2x2 --right-of eDP-1 --output DP-1-1-8 --auto --panning 3840x2400+
7680 +0 --right-of DP-1-8
Then 3rd one will start just after 2nd one ends.
Answered by przemo_li on January 5, 2021
I'm not very familiar with xrandr that's why I usually would start with a simple fixed setup in /etc/X11/xorg.conf
, like this for your case:
Section "Monitor"
Identifier "ONE"
Option "PreferredMode" "3840x2160"
Option "Position" "0 0"
Option "Primary" "true"
EndSection
Section "Monitor"
Identifier "TWO"
Option "PreferredMode" "1920x1200"
Option "Position" "3840 0"
Option "RightOf" "ONE"
Option "Primary" "true"
EndSection
Section "Monitor"
Identifier "THREE"
Option "PreferredMode" "1920x1200"
Option "Position" "5760 0"
Option "RightOf" "TWO"
Option "Primary" "true"
EndSection
Section "Device"
Identifier "intel-id"
Driver "intel"
Option "monitor-eDP-1" "ONE"
Option "monitor-DP-1-8" "TWO"
Option "monitor-DP-1-1-8" "THREE"
EndSection
Restart X server, and if ok, try to add the other panning and scale options etc.
At the and you may try to translate the xorg.conf back into a xrand command line. I know actually it would be better to do it the other way around but this way is easier for me.
Answered by rudimeier on January 5, 2021
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