Google Compute Engine中Ubuntu16.04 LTS的VNC安装异常求助

Hey there, let's tackle that gray screen issue with VNC and GNOME on your Ubuntu 16.04 LTS instance in GCE. This is a common hiccup, usually tied to either incomplete desktop installation or misconfigured xstartup settings. Here's how to fix it step by step:

• Reinstall the Full GNOME Desktop Environment
  First, let's ensure GNOME is fully installed with all required dependencies. Sometimes partial installs can lead to missing components that break the desktop session:

  sudo apt update && sudo apt install ubuntu-gnome-desktop --reinstall
  

  This will refresh your package list and reinstall the complete GNOME desktop stack, fixing any missing or corrupted files.

• Fix the xstartup Configuration
  Your xstartup file is likely not properly triggering the GNOME session. Let's reset it:

  • Back up your existing configuration to avoid losing any customizations:

    mv ~/.vnc/xstartup ~/.vnc/xstartup.bak
    

  • Create a new xstartup file with the correct commands to launch GNOME:

    nano ~/.vnc/xstartup
    

    Paste the following content into the file:

    #!/bin/sh
    unset SESSION_MANAGER
    unset DBUS_SESSION_BUS_ADDRESS
    exec /etc/X11/xinit/xinitrc
    [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
    [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
    xsetroot -solid grey
    vncconfig -iconic &
    gnome-session &
    

  • Save and exit the editor (press Ctrl+O, then Enter, then Ctrl+X).
  • Give the file executable permissions so VNC can run it:

    chmod +x ~/.vnc/xstartup
    

• Restart VNC Server and Test the Connection
  Now let's stop the current VNC session and restart it with the corrected settings:

  • Kill the active VNC session (replace :1 with your session number if different):

    vncserver -kill :1
    

  • Launch a new VNC session with a specified resolution (adjust to your preference):

    vncserver :1 -geometry 1920x1080
    

  • Reconnect to your VNC session—you should now see the full GNOME desktop instead of the gray screen.

• Check VNC Logs for Further Troubleshooting
  If the issue persists, check the VNC session logs for error messages that can point to specific problems:

  cat ~/.vnc/$(hostname):1.log
  

  Look for lines mentioning missing libraries, failed session launches, or permission issues. These logs will help narrow down any remaining problems.

内容的提问来源于stack exchange，提问作者arun nath