Public bug reported:
1) The release of Ubuntu you are using, via 'lsb_release -rd' or System
-> About Ubuntu
Description: Ubuntu 24.04.2 LTS
Release: 24.04
2) The version of the package you are using, via 'apt-cache policy
pkgname' or by checking in Software Center
mutter:
Installed: (none)
Candidate: 46.2-1ubuntu0.24.04.9
Version table:
46.2-1ubuntu0.24.04.9 500
500 http://us.archive.ubuntu.com/ubuntu noble-updates/universe amd64
Packages
46.0-1ubuntu9 500
500 http://us.archive.ubuntu.com/ubuntu noble/universe amd64 Packages
3) What you expected to happen
A desktop is connected to primary display DP-1 (arranged as the left
display) and secondary display HDMI-3 (arranged as the right display).
After using the GUI Gnome Display Settings to switch between mirror mode
and join mode DP-1 is maintained as the primary display, and the
arrangement is maintained.
The same results were expected when using Super+P to switch display
modes.
4) What happened instead
When using Super+P (gsettings shows this is mapped to
org.gnome.mutter.keybindings switch-monitor) to switch to mirror mode
and then back to join mode, the primary and secondary displays
unexpectedly switched priority and arrangement: HDMI-3 becomes the
primary display, arranged to the left, and DP-1 becomes the secondary
display, arranged to the right.
This occurs despite the primary assignment remaining in the DP-1 logical
monitor section of ~/.config/monitors.xml after each display mode switch
using Super+P:
<monitors version="2">
<configuration>
<logicalmonitor>
<x>0</x>
<y>0</y>
<scale>1</scale>
<monitor>
<monitorspec>
<connector>HDMI-3</connector>
<vendor>AMX</vendor>
<product>DVX-2210</product>
<serial>0x00000000</serial>
</monitorspec>
<mode>
<width>1920</width>
<height>1080</height>
<rate>59.919</rate>
</mode>
</monitor>
</logicalmonitor>
<logicalmonitor>
<x>1920</x>
<y>0</y>
<scale>1</scale>
<primary>yes</primary>
<monitor>
<monitorspec>
<connector>DP-1</connector>
<vendor>DEL</vendor>
<product>DELL P2319H</product>
<serial>BS26NM2</serial>
</monitorspec>
<mode>
<width>1920</width>
<height>1080</height>
<rate>60.000</rate>
</mode>
</monitor>
</logicalmonitor>
</configuration>
</monitors>
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: multimonitor
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https://bugs.launchpad.net/bugs/2116554
Title:
Primary and secondary display get swapped when using Super+P
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