The GNOME 48 runtime is no longer supported as of March 24, 2026 - Ubuntu 24.04.4 LTS - flatpak

Ubuntu 24.04.4 LTS

I made flatpak update, there is this message:

Info: runtime org.gnome.Platform branch 48 is end-of-life, with reason:
The GNOME 48 runtime is no longer supported as of March 24, 2026. Please ask your application developer to migrate to a supported platform.
Info: applications using this runtime:
io.github.dgsasha.Remembrance

I know canonical does not use flatpak, so i didnt do it, (n). What would happen if i did (y)? Would it destroy the system? Or my configuration?

I do not understand. What is it you did not do? In my opinion you have these options.

  1. Do not use this application again.

  2. Delete the application and install a version of the application that uses a Gnome runtime that is still supported.

  3. Research the application Remembrance. What is it capable of doing? Is it capable of destroying the operating system? Or, your configuration?

Does this Flatpak application run sandboxed or confined?

I have just had a thought. Ubuntu 24.04.4 LTS uses Gnome 46. Canonical will support Gnome 46 with security fixes until Ubuntu 24.04 itself reaches end of support life.

Are you thinking of removing Gnome 46? Yes, that will break the operating system.

@igorius-plombozihi I think it would really help us if you tell us what are the most important features that you are looking for.

I am fairly certain there are other apps that will do the same/similar but of course each may have some features you want and others you do not.

Here is one example that might fit your needs:

I have found this:

Technical Impact:
Users running flatpak update on rolling-release distributions (like Arch Linux) are receiving persistent security warnings regarding the unsupported runtime. Since the application is pinned to branch 48, the runtime remains installed on the host system, occupying unnecessary disk space and triggering EOL notifications.

From here

Request to migrate from Gnome 48 but for a different Flatpak app

Will removing this flatpak application also remove the runtime? Removing the runtime will break the application.

This Remembrance application has only recently migrated to runtime 48.

github location of the Remembrance Flatpak application

No. It is just information for you. That particular application that’s mentioned still uses the Gnome 48 runtime - the app has not yet been updated by the developer to the latest - Gnome 50.

Typing ‘y’ will just update all the Flatpaks apps as usual. Then you decide what to do about the app mentioned. If you use it, you must keep Gnome 48. The developer may at some point update it to work with Gnome 50 - then you can uninstall the unsupported Gnome 48 runtime. Note: some versions of Flatpak automatically uninstall unused runtimes, others don’t.

Now i understand:

flatpak list

Reminders io.github.dgsasha.Remembrance 4.0 stable flathub system

This is the app. This is a Flatpak runtime warning, not an Ubuntu problem. If i run flatpak update there is only the warning, no n y anymore. I guess i misinterpreted the y n it was the prompt for another flatpak app. I dont know, i guess i was confused.

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