Please try disabling fractional scaling in settings and then log in
again.
Also I expect using a Wayland session would not have this bug. You can
select it on the login screen from the menu in the bottom right (it's
the one called 'Ubuntu' and not 'Ubuntu on Xorg'). Is there any
particular reason why X11 is being used here?
** Tags added: multimonitor noble
** Summary changed:
- External monitor issue after dist upgrade to 24.04
+ Xorg external monitor issue after dist upgrade to 24.04
** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu)
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2084727
Title:
Xorg external monitor issue after dist upgrade to 24.04
Status in mutter package in Ubuntu:
Incomplete
Bug description:
I'm working with a friend to try to resolve an issue where her
external monitor does not work after the upgrade. It was functional
before.
She just upgraded from Ubuntu 22.04 to 24.04, and is having issues
trying to connect an external monitor to her laptop (running Intel
graphics and x11). The control panel is displaying "Changes cannot be
applied", and the monitor itself is non-functional, but it does at
least appear in the control panel.
I had her try running gnome-control-center and it did give the error
of "GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Logical
monitor scales must be identical" while doing so.
We tried deleting the .config/monitors.xml file, and tried setting the
scaling factor to be the same, with no luck.
The version of gnome-control-center is 46.2-1ubuntu0.24.04.2
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