This report was produced by Claude AI

System: Linux Mint 22.2 “Xia” / Cinnamon Desktop
Issue: System persistently booted into Wayland session; unable to switch back to X11 (Xorg)

Problem Description

On a Linux Mint 22.2 “Xia” system running the Cinnamon desktop environment, the user attempted to switch from the Wayland session back to the default X11 (Xorg) session. The LightDM login screen did not display a session selection icon, making the standard switching method unavailable.

Troubleshooting Steps

Step 1 — Login Screen Session Selector (Failed)

Action: Attempted to click the session selector icon on the LightDM login screen to choose “Cinnamon (Default)”.
Result: No session selector icon was visible on the login screen. Method not applicable.

Step 2 — System-Level LightDM Configuration (Failed)

Action: Edited /etc/lightdm/lightdm.conf and set the user-session value to cinnamon.

[Seat:*]
user-session=cinnamon

Result: System still booted into Wayland after reboot. Change had no effect.

Step 3 — AccountsService User Configuration ✅ (Resolved)

Action: Inspected and edited the user-level session record managed by AccountsService.

sudo nano /var/lib/AccountsService/users/$USER

Finding: The file contained an incorrect session name:

Session=ubuntu

Fix: Changed the value to the correct Cinnamon X11 session name:

Session=cinnamon

Result: After reboot, the system successfully launched the Cinnamon X11 desktop environment.

Root Cause

The file /var/lib/AccountsService/users/$USER contained a stale and incorrect session entry (Session=ubuntu). LightDM reads this file with the highest priority when determining which session to launch for a user — overriding any system-level configuration set in /etc/lightdm/lightdm.conf. As a result, modifications to the system config file had no effect.

Resolution

sudo nano /var/lib/AccountsService/users/$USER

Change:

Session=ubuntu

To:

Session=cinnamon

Save the file and reboot the system.

Configuration File Priority Reference

Configuration File Priority Description
/var/lib/AccountsService/users/$USER Highest Per-user session record; read by LightDM first
~/.dmrc High Alternative per-user session preference file
/etc/lightdm/lightdm.conf Low System-wide default configuration

Key Takeaway: When troubleshooting persistent Wayland session issues on Linux Mint, always check /var/lib/AccountsService/users/$USER first. This file holds the highest-priority session setting and is the most commonly overlooked location.

Verification

After reboot, confirm the active display server by running:

echo $XDG_SESSION_TYPE

Expected output: x11

Additional Notes

  • Cinnamon’s Wayland support in Linux Mint 22.2 remains at alpha stage and is not recommended for daily use.
  • If a similar issue occurs in the future, inspecting /var/lib/AccountsService/users/$USER should be the first diagnostic step.
  • Linux Mint 22.x is expected to support X11 until at least 2029 (end of support date), so switching to Wayland is not required at this time.