Xubuntu installer launcher is untrusted

[corrado venturini]

Try install Xubuntu from iso dated 23feb click on the icon 'Install Xubuntu' received a message saying the application launcher is untrusted.

[Jeremy Bícha (jbicha)]

I am adding a casper task because casper 1.493 has code in scripts/casper-bottom/25adduser to use gio to set metadata::trusted true for ubuntu-desktop-bootstrap_ubuntu-desktop-bootstrap.desktop

Xubuntu has casper 1.493 so I'm not sure why it's not working.

[ajgreeny (ajg-charlbury)]

This was the case when I first tried the Xubuntu 24.04 daily iso. I can't remember exactly the date but many weeks ago and I think I remember the same thing on many previous intermediate Xubuntu versions, eg, 23.04 and 23.10.
I have just clicked the "Launch anyway" and carried on, not giving it more thought!

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/2054835

[Darin (newhoa)]

To be trusted in Xfce, the file needs to be marked executable (seems like it already is) and gio set string metadata::xfce-exe-checksum: FILE_SHA256_CHECKSUM

The solution is here (also in some of the related links below):

https://forum.xfce.org/viewtopic.php?pid=70143#p70143

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Xubuntu is now using ubuntu-desktop-bootstrap.

So, this command works for me:

desktop_launcher="/home/xubuntu/Desktop/ubuntu-desktop-bootstrap_ubuntu-desktop-bootstrap.desktop"

gio set -t string $desktop_launcher metadata::xfce-exe-checksum "$(sha256sum $desktop_launcher | awk '{print $1}')"

The snap launcher may also need this at some point. The Settings Manager and Whisker/App Menus don't seem to require this currently, but if they do in the future or if it's launched from the file manager the same may need to be applied to it:

snap_launcher="/var/lib/snapd/desktop/applications/ubuntu-desktop-bootstrap_ubuntu-desktop-bootstrap.desktop"

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Is this something that can be done in casper or ubuntu-desktop-provision/bootstrap?

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Also related/duplicate issues:

https://github.com/Xubuntu/xubuntu-default-settings/issues/57#issuecomment-1416728186

https://bugs.launchpad.net/ubuntu/+source/xubuntu-default-settings/+bug/1991389

https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1987958

[Jane Atkinson (irihapeti)]

I've not seen this bug in the last day or so. Has it been fixed?

[corrado venturini (corradoventu)]

Problem disappeared with ISO dated 2024-04-12

[Darin (newhoa)]

Yep, issue isn't in the latest daily. Looks like this was fixed in the Casper patch:

https://git.launchpad.net/ubuntu/+source/casper/commit/?id=e910c2777d9ecfa5d100111b3e5d2b0cd149b081