Ubuntu 17.10 无征兆关闭所有窗口且系统无法操作求助

Hey there! Let's tackle this super frustrating issue you're dealing with on Ubuntu 17.10. First, let's lay out your setup clearly so we're aligned:

• 64-bit laptop with 3.7GB RAM
• Intel Core i3 4000M CPU (2.40GHz ×4)
• Running Ubuntu 17.10, fairly new to the OS overall

The Problem You're Facing #

Out of the blue, all open windows shut down without warning. After that, you can't launch any programs at all—your only option is to hold the power button to force a shutdown, and the screen looks like your attached image [故障发生后的Ubuntu桌面] when this happens. You found a similar fix in an old forum post but held off trying it, worried it might make things worse. Totally understandable—let's start with safe, diagnostic steps first instead of jumping into untested fixes.

Step 1: Dig into System Logs to Find the Root Cause #

This is the safest first move—it doesn't modify any system settings, just lets us see what's going wrong under the hood. After your next forced reboot, open a terminal and run these commands:

• To check critical system errors around the time of the crash:

  journalctl -p 3 -xb
  

  Look for entries like OOM Killer (which means your system ran out of memory) or messages about crashed services (especially anything related to GNOME or Xorg).
• To check Xorg display server errors:

  cat /var/log/Xorg.0.log | grep -i error
  

  Sudden window crashes often tie back to the display server or desktop environment.

Step 2: Rule Out Memory Shortages #

Your 3.7GB RAM is on the smaller side for Ubuntu's desktop environment, especially if you have multiple apps open. When the system runs out of memory, it might kill key processes (like the desktop shell) to free up space, leading to the issue you're seeing.

• Open System Monitor and keep an eye on RAM and swap usage. If swap is disabled or tiny, try adding a temporary swap file first (it won't persist after reboot, so it's low-risk):

  sudo fallocate -l 4G /swapfile
  sudo chmod 600 /swapfile
  sudo mkswap /swapfile
  sudo swapon /swapfile
  

  If this helps reduce crashes, you can make it permanent by adding this line to /etc/fstab:

  /swapfile none swap sw 0 0
  

Step 3: Troubleshoot the GNOME Desktop #

Ubuntu 17.10 uses GNOME by default, and sometimes shell crashes can cause this "all windows close" behavior. Try resetting your GNOME settings (this won't delete files, just revert to default desktop configs):

dconf reset -f /org/gnome/

Also, when you log in, click the little gear icon next to your username and select Ubuntu on Xorg—Wayland (the default display server at the time) had compatibility issues with older hardware, which might be triggering crashes.

Step 4: Repair Corrupted System Packages #

Even though Ubuntu 17.10 is no longer supported, fixing broken packages might resolve hidden issues:

sudo apt update
sudo apt --fix-broken install
sudo apt full-upgrade

Note: You might need to switch to old-releases Ubuntu sources if the official ones are down, but this is optional—focus on the earlier steps first.

If you can share a bit more about what that old forum fix suggested, I can help you gauge whether it's safe to try. But starting with these diagnostic steps will help us pinpoint exactly what's causing the crashes, so we can fix it without guessing.

内容的提问来源于stack exchange，提问作者netomarcus