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I can't change settings on my cups printer. He asks me for a username and password i already added for me the usergroup lpadmin . But nothing changes after a restart of cups. Still asking me for username and password and my user is not working.

d3rdon
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  • I am using saucy and my uid/pwd work for my cups. Is your user in sudo group as well? How are you accessing cups? (http://127.0.0.1:631 ?) and what is the error output in (e.g.) tail -f /var/log/syslog? – mcantsin Jan 22 '14 at 22:37
  • Just adding and removing of colord profiles and then this: Jan 23 14:32:25 ubu anacron[1011]: Job `cron.daily' terminated Jan 23 14:32:25 ubu anacron[1011]: Normal exit (1 job run) Jan 23 14:37:36 ubu kernel: [ 1493.123196] type=1400 audit(1390484256.874:87): apparmor="DENIED" operation="file_lock" parent=1873 profile="/usr/sbin/cupsd" name="/run/utmp" pid=7519 comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0 – d3rdon Jan 23 '14 at 13:41

5 Answers5

9

I had the same problem.

I seem to have fixed it with the command:

sudo usermod -a -G lpadmin pi

This adds the user name pi to the cups user group lpadmin. You can then use the default user name "pi" and password "raspberry" when prompted.

Mudit Kapil
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Phil
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4

Check if cups is accessible on your localhost through the webinterface

Listen localhost:631
WebInterface Yes

in /etc/cups/cupsd.conf. Then restart cups using

sudo killall cupsd
sudo /etc/init.d/cups restart

and check if you user is part of the group lpadmin

cat /etc/group | grep YOUR-USERNAME

After that you should be able to access cups with you username & pwd on http://127.0.0.1:631/

If it still fails check the cups error log here

tail -f /var/log/cups/error_log

P.S. you might also want to read this thread.

mcantsin
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  • I checked everything my Problem still prevails.

    Here is my error log output

        E [23/Jan/2014:14:31:56 +0100] Unable to bind socket for address 127.0.0.1:631 - Address already in use.

    E [23/Jan/2014:14:32:27 +0100] Unable to finalize "/etc/cups/subscriptions.conf": No such file or directory E [23/Jan/2014:14:34:06 +0100] [Client 8] Local authentication certificate not found.

     – d3rdon Jan 23 '14 at 13:38
2
  • You can use credentials of any user who is in the lpadmin group.

  • To see the list of users in lpadmin group, use the command in a root shell

    cat /etc/group | grep lpadmin

harish2704
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2

Just upgraded a bunch of client computers from 14.04 to 16.04 on and ran into this issue.
This appears to be the problem:
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1157318

The fix

apt install apparmor-utils
aa-complain /etc/apparmor.d/usr.sbin.cupsd

Of course, make sure you really have your user ID in the lpadmin group, as the OP stated.

BISI
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0

If you ended up here like me on a newer version, 18.04, you should already be apart of this group. So your username and password should work.

Goddard
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