Chaos Across Screens: Resolving Multi-Monitor Positioning Bugs in Ubuntu 25.10

With the release of Ubuntu 25.10, updates to the GNOME Shell and the continued evolution of the Wayland compositor have introduced unintended friction for multi-monitor users. Many users report that program windows "forget" their assigned displays, open in the corner of the secondary monitor, or fail to respect workspace boundaries upon waking from sleep. This "broken" positioning is often tied to the logical monitor layout within monitors.xml or the way Wayland handles window persistence across different refresh rates. This tutorial outlines how to re-anchor your windows and stabilize your desktop environment's spatial memory.

Table of Content

• Purpose of Window Persistence Calibration
• Common Multi-Monitor Failure Scenarios
• Step-by-Step: Restoring Window Order
• Best Results: Stability Optimization
• FAQ
• Disclaimer

Purpose

The primary goal of this guide is to fix the Spatial Mismatch that occurs in modern Ubuntu environments. When window positioning breaks, it’s usually because the mutter window manager loses the mapping between a window's "ID" and its "Coordinates" on the virtual desktop.

• Enforcing Rules: Using GNOME extensions to force specific apps to specific monitors.
• Cleaning Configuration: Purging old monitor data that might be conflicting with the current hardware setup.
• Compositor Reset: Ensuring that Wayland correctly identifies "Primary" vs "Secondary" monitors during the boot handshake.

Use Case

This tutorial is designed for users experiencing:

• Window Drift: Apps opening on the wrong monitor despite being closed on the correct one.
• Sleep Jumbles: All windows moving to the primary monitor after the system wakes up from suspend.
• Off-Screen Windows: Programs opening in "invisible" areas beyond the visible pixel boundaries.
• Mixed DPI Issues: Positioning breaking when moving windows between a 4K monitor and a 1080p laptop screen.

Step-by-Step

1. Reset the Monitor Configuration File

Old or corrupted layout data in your user profile is the most frequent cause of positioning errors.

1. Open the Terminal and navigate to the config folder: cd ~/.config
2. Rename the current monitor config: mv monitors.xml monitors.xml.bak
3. Log out and log back in. Ubuntu will generate a fresh, clean layout file.

2. Install the 'Auto Move Windows' Extension

Since Ubuntu 25.10's native memory can be flaky, use the official GNOME tool to enforce positioning.

• Install the Extension Manager: sudo apt install gnome-shell-extension-manager.
• Search for and enable "Auto Move Windows".
• In the extension settings, add your frequent apps and assign them to specific monitor numbers.

3. Switch from Wayland to Xorg (Optional)

If window positioning is critical and Wayland remains unstable for your specific GPU:

• Log out of Ubuntu.
• On the login screen, click your name.
• Click the gear icon in the bottom right corner and select "Ubuntu on Xorg".
• Log in; X11 often handles fixed window coordinates more reliably for legacy applications.

4. Disable Variable Refresh Rate (VRR)

Ubuntu 25.10's experimental VRR can cause the compositor to "re-size" the screen dynamically, which confuses window positions.

• Go to Settings > Displays.
• Select each monitor and ensure "Variable Refresh Rate" is turned Off while troubleshooting.

Best Results

FAQ

Why do my windows always move to the left monitor?

Ubuntu identifies the monitor positioned at coordinates (0,0) as the "origin." If your secondary monitor is logically placed to the left or above your primary in Settings, apps may default there if the primary display takes longer to wake up from sleep.

Can I use 'Devilspie2' on Ubuntu 25.10?

Devilspie2 is an excellent tool for Xorg, but it does not work on Wayland. For Wayland-based window positioning, stick to GNOME extensions like "Smart Auto Move" or "Window Is Ready - Notification Remover."

Will a HDMI vs. DisplayPort connection matter?

Yes. DisplayPort supports Hot Plug Detection (HPD) differently than HDMI. If your monitor disconnects "electrically" when turned off, Ubuntu thinks it has been unplugged and moves all windows to the remaining active screen.

Disclaimer

Ubuntu 25.10 is a short-term release and may contain experimental code not found in LTS versions. Modifying GNOME Shell extensions or switching display protocols can impact system performance and power consumption. This tutorial is based on the initial 25.10 release architecture as of March 2026. Always back up your ~/.config folder before making manual XML edits.

Tags: Ubuntu2510, MultiMonitor, GNOME, Wayland, LinuxDesktop