General/Other Troubleshooting
Issue 1: I am seeing messages like "Unable to find GUI for username..." and "No GUI available" in the system log.
Solution:
These are normal and should not cause any concerns.
Issue 2: How do I check the syslog for HPLIP system errors?
Solution:
With superuser (su/sudo) privileges, use the following command to view the syslog. Look for any errors during the time of the failure.
# tail -f /var/log/messages
Issue 3: When I go to login to the CUPS web interface (http://localhost:631) it asks for my root password--and my root password doesn't give me access.
Solution:
First verify with your distribution the best way to install your printer.
To enable the CUPS web interface follow these directions.
Edit the cupsd.conf file.
# gedit /etc/cups/cupsd.conf
Find this section:
# Restrict access to the admin pages... <Location /admin> #Order allow,deny #Allow localhost </Location>
Change it to:
# Restrict access to the admin pages... <Location /admin> Order allow,deny Allow localhost </Location>
Save/Exit, restart CUPS:
# /etc/init.d/cups restart
for Ubuntu
$ /etc/init.d/cupsys restart
Open your web browser, go to http://localhost:631. Complete the administrative tasks you need to complete.