wingpanel does not extend fully to the edges on wayland

[fidelisakilan]

What Happened?

Whenever I'm running in wayland on 200% scaling, the panel doesn't stretch fully to the edges

I'm running NixOS 25.05 with the Pantheon desktop environment.

services.xserver.enable = true;
services.xserver.desktopManager.pantheon.enable = true;

Steps to Reproduce

1. Enabled secure session in lightdm gear icon in lockscreen
2. After login, desktop wingpanel elements are not aligned to the edges

Expected Behavior

It should wingpanel widgets should be aligned to the edges

OS Version

Other Linux

Session Type

Secure Session (Wayland)

Software Version

Latest release (I have run all updates)

Log Output

Hardware Info

No response

[bobby285271]

@lenemter I started looking this since I plan to drop X11 session in NixOS very soon. I believe my case is not a duplicate of elementary/gala#2505 since I cannot reproduce this under 1x scale and also cannot reproduce this in x11 session.

It looks like after removing exactly the following line the width looks correct to me (though this is probably not a proper fix, I don't believe we only need to scale height but not width...):

wingpanel/src/PanelWindow.vala

Line 106 in 1bc8ab6

monitor_dimensions.width /= get_scale_factor ();