org.gnome.Mutter.DisplayConfig syntax

[Saroumane]

Hello Louis,

I'm not opening an issue but asking for help.
I see here https://github.com/Louis9902/dotfiles/blob/4b400a20d510a3e8a579740dbc95ad1e83fb8684/packages/bash/dot-config/bash/config.d/monitors.sh that you use org.gnome.Mutter.DisplayConfig with "direct" calls.

I managed to do it too to put a VGA monitor in a specific resolution.
Months ago it worked, now it does not.

$ gdbus call --session --dest=org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.ApplyMonitorsConfig 1 1 "[(0, 0, 1, 0, true, [('VGA-1', '640x480i@29.989593505859375', [] )] )]" "[]"
Error: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Invalid mode '640x480i@29.989593505859375' specified
(According to introspection data, you need to pass 'uua(iiduba(ssa{sv}))a{sv}')

I suspect a change of syntax, but I'm lost with the hint "you need to pass 'uua(iiduba(ssa{sv}))a{sv}' "
Maybe you can help me to find how to change the command ?
Thanks !
(In case you wonder why I'm asking you : you are the top result with this search : https://github.com/search?q=uua%28iiduba%28ssa%7Bsv%7D%29%29a%7Bsv%7D&type=code )

[Louis9902]

Hey the hint means something like: (from here in Basic types)

UInt32, UInt32, Array of [Int32, Int32, Double, UInt32, Bool, Array of[], and so on ].
But for me it looks more like the mode string (640x480i@29.989593505859375) is not correct anymore. You can get the mode string as well from the script, maybe take a look at

dotfiles/packages/bash/dot-config/bash/config.d/monitors.sh

Lines 5 to 8 in 4b400a2

	serial=$(busctl --user \
	call org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig \
	org.gnome.Mutter.DisplayConfig GetCurrentState \
	--json short | jq ".data[0]")

EDIT:
And just for reference: https://github.com/GNOME/mutter/blob/main/src/org.gnome.Mutter.DisplayConfig.xml

[Louis9902]

Since there is no other question I'm closing this one

[Saroumane]

Hello, thank you for your answer and sorry for not providing feedback. I must admit I felt discouraged by the complexity of this syntax. I will try again to understand how it works now.