Ubuntu 16.04下HP OfficeJet 4655仅打印黑白问题排查求助

Hey there, let's work through this black-only printing issue step by step. From your troubleshooting notes, we know the hardware is solid—color copies work, other PCs print color fine—so this is definitely a software or configuration problem specific to your Ubuntu machine. Let's start with the most obvious red flag: the broken CUPS web interface.

1. Repair the CUPS Web Interface Access #

Getting "NOT FOUND" when visiting localhost:631 admin pages means CUPS isn't running properly or its web interface is disabled. Let's fix that first:

• Open a terminal and run these commands to restart CUPS and re-enable the web interface:

  sudo systemctl stop cups
  sudo systemctl start cups
  sudo cupsctl WebInterface=yes
  

• Try accessing localhost:631 again—you should see the full admin dashboard now. If not, check if your CUPS config files are intact:

  ls -la /etc/cups/
  

  If files like cupsd.conf or printers.conf are missing or corrupted, restore the default config with:

  sudo cp /etc/cups/cupsd.conf.default /etc/cups/cupsd.conf
  sudo systemctl restart cups
  

2. Verify Global Printer Color Settings in CUPS #

Once you can access the CUPS admin page:

• Navigate to the Printers tab and select your HP OfficeJet 4655.
• Click Administration > Set Default Options.
• Look for the Color Mode setting (usually under "Printing Options" or "Quality")—make sure it's set to Color instead of Grayscale or Black Only.
• Save the changes, then print a color test page directly from CUPS to confirm.

3. Check Per-Application Color Overrides #

Sometimes apps override the global printer settings:

• In apps like LibreOffice, go to File > Print, select your printer, then click Properties.
• Double-check the color mode is set to Color here—some apps default to grayscale even if the printer's global setting is correct.

4. Re-Validate HPLIP Driver Setup #

Even though you reinstalled HPLIP, let's make sure the driver is properly configured:

• Run the HPLIP setup wizard in terminal (use sudo if needed):

  sudo hp-setup
  

• Follow the prompts to re-select your printer, and ensure you choose the full-feature HP driver (not a generic alternative).
• After setup, run the HPLIP diagnostic tool to catch any missing dependencies or misconfigs:

  hp-check
  

  Follow the tool's recommendations to fix any issues it flags.

5. Reset the Printer's CUPS Queue #

A corrupted print queue can cause weird behavior like this:

• In the CUPS admin page, go to your printer > Maintenance > Cancel All Jobs.
• Then click Administration > Delete Printer to remove the existing entry.
• Re-add the printer via either hp-setup or Ubuntu's Settings > Printers > Add Printer.

Give these steps a try—most likely fixing the CUPS interface and verifying the color settings will resolve the issue.

内容的提问来源于stack exchange，提问作者Ron