Ubuntu 16.04 LTS下Modem Manager GUI（0.0.18-3）无法访问求助

Hey there, let's work through this Modem Manager GUI error you're facing on Ubuntu 16.04 LTS. The 0.0.18-3 version can hit a few common snags, so let's break down troubleshooting step by step:

1. Grab the Exact Error Details #

First, let's get specific about what's going wrong. Launching the tool from the terminal will show us detailed error messages that the GUI might hide:

• Open a terminal and run:

  modem-manager-gui
  

  Note down any error text that appears—this will help us pinpoint whether it's a dependency issue, permission problem, or service failure.

2. Fix Corrupted or Broken Packages #

You already ran sudo apt-cache policy to check version info, but let's ensure the packages themselves are intact:

• First, scan for broken dependencies:

  sudo apt-get check
  

• If the scan finds issues, fix them with:

  sudo apt-get install -f
  

• If the problem persists, reinstall Modem Manager GUI to rule out corrupted files:

  sudo apt-get purge modem-manager-gui
  sudo apt-get install modem-manager-gui
  

3. Verify Services and Permissions #

Modem Manager GUI relies on background services and proper user permissions to work. Let's check those:

• First, make sure modemmanager and network-manager are running:

  sudo systemctl status modemmanager network-manager
  

  If either service shows as "inactive", start them with:

  sudo systemctl start modemmanager network-manager
  

  To ensure they start automatically on boot:

  sudo systemctl enable modemmanager network-manager
  

• Add your user to the groups that grant access to modem and network devices:

  sudo usermod -aG dialout,netdev $USER
  

  Log out and back in for these group changes to take effect.

4. Ubuntu 16.04-Specific Checks #

Since Ubuntu 16.04 is an older LTS release, there might be compatibility quirks with the 0.0.18-3 package:

• Check for any available updates (keep in mind 16.04 is end-of-life, so official updates are limited—proceed carefully if using third-party repos):

  sudo apt-get update && sudo apt-get upgrade modem-manager-gui network-manager
  

• Test running the tool with elevated permissions temporarily to rule out permission blocks (this isn't a long-term fix, just a diagnostic step):

  sudo modem-manager-gui
  

If none of these steps resolve the issue, share the error output you got from running modem-manager-gui in the terminal—that will help dig deeper into the problem.

内容的提问来源于stack exchange，提问作者Abang Alson