** Description changed: Ubuntu Noble 24.04 desktop icons ng does not show thumbnails of pdf and other image files. I do not know if this bug is related to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/2047256 that was fixed for nautilus. - No LSB modules are available. Description: Ubuntu 24.04 LTS Release: 24.04 gnome-shell-extensions: - Installed: 46.1-2 - Candidate: 46.1-2 - Version table: - *** 46.1-2 500 - 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages - 500 http://archive.ubuntu.com/ubuntu noble/universe i386 Packages - 100 /var/lib/dpkg/status + Installed: 46.1-2 + Candidate: 46.1-2 + Version table: + *** 46.1-2 500 + 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages + 500 http://archive.ubuntu.com/ubuntu noble/universe i386 Packages + 100 /var/lib/dpkg/status + + [ Impact ] + + This bug prevents Desktop Icons to create thumbnails of the files placed + in the desktop. Thumbnails are important because they allow to identify + at a glance the content of some files, like pictures or PDF documents. + + This bug happens because the desktop application relies on the gnome- + desktop library thumbnail functions, which make use of `bwrap` to launch + each thumbnailer. The problem is that bwrap requires unprivileged user + namespaces, but in Ubuntu 23.10 it was restricted for security reasons, + and each program wanting to use it require an exception for apparmor. + + [ Test plan ] + + To test the patch, first be sure to be running the Desktop Icons + extension distributed in a .deb package with Ubuntu. It won't work with + the ones installed directly from the Gnome Extensions web page. To check + it, you can use the "gnome-extensions-app" program. + + Copy some files that allow thumbnailing (like pictures, or PDF files) to + the Desktop folder. + + Open a terminal and type `rm -rf ~/.cache/thumbnails` to delete all the + current thumbnail files. + + Type `ps ax | grep ding` to find the PID of the desktop icons process. + + Use `kill XXXX` (being XXXX the PID of the desktop icons process) to + kill it, and force a desktop reload. + + If the patch works, the files will have thumbnails (if they support + them); if it doesn't work, all the files will show the default icon for + their file type. + + [ Were problems could occur ] + + If there is a typo in the apparmor definition file, in the best-case + scenario thumbnails won't work. + + In the worst-case scenario, a different program could receive + permissions to use unprivileged user namespaces. + + A bug in the desktop icons program could lead to a program with access + to unprivileged user namespaces.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2064849 Title: Ubuntu 24.04 desktop icons ng image thumbnails no longer displayed To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell-extension-desktop-icons-ng/+bug/2064849/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
