Overscan/Screen resolution and GNOME Shell / GDM

[[[Message translated from French with Google Translate via the “Translate Web Page” for Firefox extension]]]

Hello everyone :wave:, I am François G ., I live in France, I am almost 16 years old and I am passionate about GNU/Linux desktop environments, and more particularly KDE-Plasma and GNOME .

My system configuration: Fedora 41 KDE-Plasma (v6.2) Spin; and a virtual machine (with vmware) of Fedora 41 Workstation up to date.
_ _
For an unreasonable fad :crazy_face:, I use overscan even when no prehistoric monitor/TV is connected to my PC. In fact, I like having a thin black band (my favorite color) of 9 pixels (my favorite number) all around the content of my screen.

And knowing that x11/xorg has a fateful future, I decided to no longer use it (the session).
Fedora has also removed it from its flagship editions since v41; GDM and SDDM therefore no longer display a session button (except GDM, which offers a “GNOME Classic” session) since Wayland is the only session available. So I only use Wayland anymore
_ _
For the overscan, therefore:

Settings GNOME47 Plasma 6.2
Overscan setting? Yes Yes
Screen resolution setting? Yes Yes
Do all these settings apply to the connection manager (GDM/SDDM)? No Yes, by clicking on a button “apply Plasma configuration”
Finely adjustable overscan? No Yes

Only KDE Plasma checks all the boxes; that’s why I use it instead of GNOME… However, I really miss the clean and consistent design of GNOME. About the design of GOMME, I have suggestions to make which I will say in a new topic, which develops the GNOME interface, is it on this forum?

But back to our electric sheep (French expression for “Let’s get back to business!” I believe).

Remarque: avant Fedora 41/KDE Plasma 6.xx ; les paramètres d’overscan de KDE ne s’appliquaient pas au SDDM, même en cliquant sur le bouton “appliquer la configuration de Plasma”:

Je suppose que c’est parce que le SDDM s’affichait avec x11/xorg, en effet ces paramètres ne sont disponible que pour wayland:

Que faire? Qui dois-je contacter pour que ce souci soit corrigé? :pray: Or if not, does anyone know how I can fix this?

@sid @ebassi @matthiasc @mcatanzaro @GNOMEFoundation

Please do not @reference random users.

You can post your question and wait for response.

1 Like

I found a complete solution for my over/underscan problems in GNOME. Apparently there is a clone of ~/.config/monitors.xml

logical

0

0

1.25

yes

eDP-1

AUO

0x208d

0x00000000

1920

1080

60,049

yes

for the GDM ( /var/lib/gdm/.config/monitors.xml ):

logical

0

0

1.25

yes

eDP-1

AUO

0x208d

0x00000000

1920

1080

60,049

yes

Note that this is not available on Ubuntu. I think that if we find this file in Fedo 41 it is because RedHat is pushing to go Wayland-only and abandon Xorg which is too heavy to manage, so the GNOME devs had to port GDM to Wayland. I don’t know if you noticed, but Pantheon DE and Cinnamon DE/LinuxMint have released experimental Wayland versions. By the way, XFCE DE is also getting involved:

Two groups are currently yelling about this: NVIDIA card owners and graphic designers…

So, I managed to enable underscan in GDM.

If you are a noob like me and don’t want to get your hands dirty, this flatpak works well. It’s the one that gave me the clue by asking me to create the ~/.config/monitors.xml by changing screen settings via the settings. So here it is:

https://gdm-settings.github.io/

There should be an official GNOME customizer application, which would gather everything (gnome settings customization section, gnome-tweaks, gdm-settings, gnome-extensions…) and I suggest that all the interface customization options scattered in gnome settings be gathered there.