Wrong mouse pointers since dmz-cursor-theme 0.4.5.2

[Alistair Cunningham]

After upgrading from Ubuntu 24.04 to 25.04, all the "DMZ-White" mouse pointers are wrong. If I change to another cursor style in gnome-tweaks and back to DMZ-White, they're still wrong.

Doing "cd /usr/share/icons/DMZ-White/cursors; ln -s left_ptr default", and changing to another style and back to DMZ-White seems to fix the default pointer, but the others are still wrong.

ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: dmz-cursor-theme 0.4.5.2
ProcVersionSignature: Ubuntu 6.14.0-15.15-generic 6.14.0
Uname: Linux 6.14.0-15-generic x86_64
ApportVersion: 2.32.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed May 7 18:34:40 2025
Dependencies:

InstallationDate: Installed on 2024-06-08 (333 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
PackageArchitecture: all
SourcePackage: dmz-cursor-theme
UpgradeStatus: Upgraded to plucky on 2025-05-07 (0 days ago)

[GBate (bouki)]

I installed Xubuntu version 25.04 and I'm using a dark theme (Greybird-dark).

I need a light theme for mouse cursors instead; the DMZ theme (white) is pretty good.

The problem is this: when I use Firefox or Thunderbird (both are versions of the Mozilla ppa, not snap), the cursors from the Adwaita theme revert; as soon as I exit the Firefox window, the DMZ theme (white) reverts.

I installed "breeze-cursor-theme," which has a white theme. With this theme, I don't have the problem; it stays in Firefox and Thunderbird.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

It seems to be a regression in the theme itself, not a mutter bug. Downgrading to dmz-cursor-theme 0.4.5ubuntu1 (https://launchpad.net/ubuntu/+archive/primary/+files/dmz-cursor-theme_0.4.5ubuntu1_all.deb) fixes the issue.

[Jeremy Bícha (jbicha)]

The only difference I can find in the resulting binary package (except for the changelog) is that the older version has this in its postinst script

update-alternatives --install /usr/share/icons/default/index.theme \
        x-cursor-theme /usr/share/icons/DMZ-White/cursor.theme 100

compared to

update-alternatives --install /usr/share/icons/default/index.theme \
        x-cursor-theme /usr/share/icons/DMZ-White/cursor.theme 50

The Debian alternatives system should be irrelevant to this bug.

[Daniel van Vugt (vanvugt)]

I think most likely there's something different about the filesystem layout in the new version. Symlinks or file names.

Much less likely the new version is using a mixture of X11 and CSS cursor names, which might confuse Mutter. I don't remember how well it copes with mixtures.