三显示器下除背景图外所有内容出现撕裂问题求助

Hey Jamie, since you’ve already confirmed multi-monitor works fine generally and the Mate desktop environment has no issues, we can definitely focus on narrowing down software-specific conflicts with your current setup. Here are some actionable steps to troubleshoot:

Troubleshooting Steps #

• Identify your active desktop environment
  First, let’s confirm exactly which DE you’re having issues with (since Mate works). Run these commands in a terminal to get the details:

  echo $XDG_CURRENT_DESKTOP
  echo $DESKTOP_SESSION
  

  This will help target our fixes to the right environment.

• Reset display configuration files
  Corrupted display configs are a common culprit. For most DEs, these are stored in your user config directory:

  • For GNOME: Backup and delete the monitors config file, then restart the shell:

    cp ~/.config/monitors.xml ~/.config/monitors.xml.bak
    rm ~/.config/monitors.xml
    gnome-shell --replace
    

  • For KDE: Backup and remove the kscreen config directory:

    cp -r ~/.config/kscreen ~/.config/kscreen.bak
    rm -r ~/.config/kscreen
    

  After resetting, log out and back in to let the system rebuild default display settings.

• Check system logs for errors
  Logs often reveal hidden issues with display servers or DE components:

  • For Xorg: Review the main log file for display-related errors:

    cat /var/log/Xorg.0.log | grep -i "error\|failed\|monitor"
    

  • For Wayland: Filter system logs for Wayland-specific messages:

    journalctl -b | grep -i wayland
    

  Look for entries that mention your monitors, graphics drivers, or DE components failing to load.

• Verify graphics driver status
  Even though multi-monitor works in Mate, your primary DE might have stricter driver compatibility. Check which driver your GPU is using:

  lspci -k | grep -A 2 -i "VGA"
  

  If you’re using proprietary drivers (like NVIDIA), try reinstalling them or switching to the open-source alternative temporarily to rule out driver conflicts.

• Disable DE extensions/startup apps
  Third-party extensions or startup tools can interfere with display handling:

  • For GNOME: Disable all extensions at once to test:

    gnome-extensions disable --all
    

  • For any DE: Open your startup applications manager and disable any non-essential tools that handle displays or window management.
    Log out and back in after making changes to see if the issue resolves, then re-enable items one by one to find the culprit.

内容的提问来源于stack exchange，提问作者Jamie Hutber