Linux Mint 18.3 MATE下Python启动脚本运行异常求助

Hey there, let's work through this tricky startup script problem together—since you've already tried switching interpreters and shortening paths, let's dig into the next likely culprits:

1. Your script might be launching too early (the morning boot clue is key here) #

Morning boots often mean your system is loading more services in parallel, and your script could be firing up before critical stuff (like network mounts, desktop services, or even fully initialized filesystem access) is ready. This can make it hang silently even though the process shows up.

• Try adding a delay to your startup command. Update your MATE startup entry to:
  bash -c "sleep 30 && /absolute/path/to/python /absolute/path/to/your/script.py"
  Start with 30 seconds, then tweak down if it works—you don't want to wait longer than needed.
• If you want more control, you could switch to a systemd timer instead of MATE's startup apps, but that's a bit more involved; let's stick to simpler fixes first.

2. Capture hidden errors with logging #

Since the process exists but the script isn't doing its job, it's almost certainly hitting an error you can't see. Let's log everything:

• Modify your startup command to write all output to a log file:
  /absolute/path/to/python /absolute/path/to/your/script.py > ~/startup_script_log.txt 2>&1
  After a failed boot, open ~/startup_script_log.txt—this will show you exactly where it's failing (missing modules, permission issues, etc.).
• You can also add detailed logging directly to your Python script using the built-in logging module to track every step, which helps pinpoint where it's getting stuck.

3. Check if the startup environment is missing key variables #

When you run a script in your terminal, you have a full set of environment variables—but MATE's startup apps run with a stripped-down environment. This can break scripts that rely on things like PYTHONPATH, custom env vars, or even a specific PATH for dependencies.

• Add this snippet at the very top of your script to log the environment:

  import os
  with open('/home/your-username/env_check_log.txt', 'w') as f:
      for key, value in os.environ.items():
          f.write(f"{key} = {value}\n")
  

  Compare this log with the output of env in a working terminal session—look for missing variables that your script needs, then set them explicitly either in your startup command or at the top of the script.

4. Inspect the stuck process state #

You said the process is always there—let's check what it's actually doing:

• After a failed boot, run ps aux | grep your-script-name.py to get the process ID (PID).
• Then run ps -p <PID> -o stat= to see its state:
  • Z = zombie process (it already exited, but its parent didn't clean it up—this means your script crashed silently)
  • T = stopped process (it's waiting for input, like a prompt that doesn't exist in the startup context)
  • S = sleeping (it's stuck waiting for a resource, like a network connection that isn't ready yet)
• If it's stopped (T), check if your script has any input prompts that don't make sense when running headless at startup.

5. Recreate the startup entry from scratch #

Sometimes MATE's startup app entries can get corrupted in subtle ways.

• Delete the existing entry, restart your system, then add it back fresh.
• Double-check that you're using absolute paths for both Python and your script (e.g., /usr/bin/python3.6 instead of just python—this avoids any path confusion in the startup environment).

6. Test with a minimal script to isolate the issue #

To rule out problems with your specific script, make a simple test script and add it to startup:

# test_startup.py
from datetime import datetime
with open('/home/your-username/startup_test.log', 'a') as log_file:
    log_file.write(f"Test script ran successfully at {datetime.now()}\n")

If this test script works every time but your main script doesn't, the problem is definitely in your main script's logic or dependencies—not the startup setup.

内容的提问来源于stack exchange，提问作者Alexander Lavrenko