Public bug reported: After upgrading to Ubuntu 26.04, the system does not provide any Xorg session option in the login screen.
Observations: - /usr/share/xsessions/ directory is completely missing - Only Wayland sessions exist under /usr/share/wayland-sessions/ - No gnome-xorg.desktop file is present - Installing/reinstalling gnome-session, ubuntu-session, and xserver-xorg does not restore Xorg session entries Expected behavior: - System should provide a selectable "GNOME on Xorg" or "Ubuntu on Xorg" session in GDM Actual behavior: - No Xorg session is available in the gear icon - Manually creating an Xorg session entry makes it appear in GDM - However, selecting it results in a login loop (session immediately crashes and returns to login screen) Additional details: - Wayland session works normally - Xorg is installed (xserver-xorg-core present) - journalctl shows: "Dependency failed for [email protected]" and "Dependency failed for [email protected]" This suggests GNOME cannot start under Xorg even though Xorg is installed. Steps to reproduce: 1. Upgrade system to Ubuntu 26.04 2. Log out and check GDM session options 3. Observe that no Xorg session is available 4. (Optional) Create manual Xorg session entry 5. Attempt login → results in login loop Impact: Icons/Components flickers of some windows like system Monitor and Files. Users cannot use GNOME on Xorg at all, even as a fallback for Wayland issues (e.g., graphical glitches, driver incompatibility). GPU information : $ lspci | grep -E "VGA|3D" 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics G1 (Ice Lake) (rev 07) ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: gdm3 50.0-0ubuntu1 ProcVersionSignature: Ubuntu 7.0.0-14.14-generic 7.0.0 Uname: Linux 7.0.0-14-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Apr 30 16:29:18 2026 InstallationDate: Installed on 2025-04-21 (374 days ago) InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash XDG_RUNTIME_DIR=<set> SourcePackage: gdm3 UpgradeStatus: Upgraded to resolute on 2026-04-24 (6 days ago) mtime.conffile..etc.gdm3.custom.conf: 2026-04-28T22:36:07.185662 ** Affects: gdm3 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute third-party-packages wayland-session -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/2150736 Title: GNOME on Xorg session missing and manual Xorg session causes login loop on Ubuntu 26.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2150736/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
