gnome: update to GNOME 46

[danth]

No description provided.

[trueNAHO]

Is the cursor supposed to be a block:

Also, the testbed-gnome-dark testbed runs extremely slow with this PR. Would increasing the CPU and RAM resolve this?

[danth]

Is the cursor supposed to be a block

No, it's not. There seems to be an issue with the cursor configuration.

I've seen the same situation before when someone swapped from KDE to GNOME and some state was left over in the home directory which set their cursor to a package which was no longer installed. This cannot be the issue here, since the VM is reset on every boot, but perhaps it's something similar.

Also, the testbed-gnome-dark testbed runs extremely slow with this PR. Would increasing the CPU and RAM resolve this?

This is most likely due to the lack of hardware acceleration for graphics, which is being worked on upstream in NixOS/nixpkgs#279009.

[danth]

Adding the following to testbed.nix makes the cursor appear correctly:

  stylix.cursor = {
    name = "Adwaita";
    package = pkgs.gnome.adwaita-icon-theme;
  };

So the issue seems to be that the cursor we use by default, that being Vanilla-DMZ, doesn't load properly in GNOME Shell any more.

Should we work on this in a follow-up PR?

[trueNAHO]

Should we work on this in a follow-up PR?

Maybe we should address it in this PR to avoid confusing users.

[danth]

The cursor issue occurs with the current version of Stylix too, when combined with GNOME 46 - so it wasn't introduced by the changes made here. It won't show up in the testbed for master yet since the master branch is currently pinned to an older nixpkgs revision, but it happens when using master with the latest nixpkgs.

Merging this now will fix some other visual issues due to the CSS being aimed at an older version of GNOME.

The only case where this could introduce new user facing issues is if the user is tracking our pinned nixpkgs, which is not something we currently recommend (since it's only bumped if necessary to make the tests pass).

[trueNAHO]

Merging this now will fix some other visual issues due to the CSS being aimed at an older version of GNOME.

I guess we should just merge this PR then.