Public bug reported:

Description:
When running `update-desktop-database` on Ubuntu Studio 24.04 I receive the 
following warning:

    Warning in file 
"/usr/share/applications/displaycal-vrml-to-x3d-converter.desktop":
    usage of MIME type "x-world/x-vrml" is discouraged
    (the use of "x-world" as media type is strongly discouraged in favor of a 
subtype of the "application" media type)


Impact:
The warning does not affect functionality, but it clutters the output of 
`update-desktop-database` and uses a deprecated MIME type. Updating the 
.desktop file to use `application/x-vrml` (or `model/vrml`) would resolve the 
warning.

Additional files:
- Attached tarball generated by `ubuntu-bug displaycal` (contains system info).
- Optional: edited copy of 
`/usr/share/applications/displaycal-vrml-to-x3d-converter.desktop` with 
corrected MimeType line.

Severity: low

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: displaycal 3.9.11-2ubuntu0.24.04.2
ProcVersionSignature: Ubuntu 6.11.0-1016.17~24.04.1-lowlatency 6.11.11
Uname: Linux 6.11.0-1016-lowlatency x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sun Feb 15 17:15:22 2026
InstallationDate: Installed on 2025-04-27 (294 days ago)
InstallationMedia: Ubuntu-Studio 24.04.2 LTS "Noble Numbat" - Release amd64 
(20250215)
SourcePackage: displaycal-py3
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: displaycal-py3 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble

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https://bugs.launchpad.net/bugs/2141875

Title:
  Warning: “x-world/x-vrml” MIME‑type is discouraged in
  displaycal‑vrml‑to‑x3d‑converter.desktop

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