The whole Kernel modules section is confusing. Is it mandatory? What exactly should we do?
As suggested by the Arch wiki, I used the
- HostNameLookups Double
option. However, that resulted in following error message: IP lookup failed - connection from localhost closed!
and I wasn't able to add printers via the CUPS web interface (internal server error)
It seems there is an outstanding bug with respect to the HostNameLookups: http://www.cups.org/str.php?L4070+Qversion:%20-feature
Removing the HostNameLookups double form the cups config file resolved my issue. Not sure why this used to solve instead of create problems.
Device node permissions
I got a problem after update of hplip / cups and foomatic. My printer not working anymore.
So I first check possible problems and read section Device node permissions. It's recommended to verify that permissions are 660. It was my case so I am looking to find another solution.
After a long time and read I was back to this section. I read also section below Device node permission troubleshooting. As my conf was with well permission I don't really read all carefully. It was the 3rd/4th time before I see the note about 666 permissions. I tried this and it's solved my problem.
So I think it would be great to make also a note on Device node permissions about 666. Because my conf look allright as writing in wiki, but in fact not.
How to get the damned IP.
cups + systemd
Need more info for chapter "Installed Printers Do Not Appear in Print Dialogs After Installing/Upgrading to Systemd". Existing suggestions from article (change socket path, etc) does not help.
$ cat /etc/systemd/system/sockets.target.wants/cups.socket | grep Listen ListenStream=/var/run/cups/cups.sock $ systemdctl status cups cups.service - CUPS Printing Service Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled) Active: active (running) since Wed, 24 Oct 2012 11:54:21 +0400; 20min ago Main PID: 15040 (cupsd) CGroup: name=systemd:/system/cups.service └ 15040 /usr/sbin/cupsd -f Oct 24 11:54:21 nikifor systemd: Starting CUPS Printing Service... Oct 24 11:54:21 nikifor systemd: Started CUPS Printing Service. Oct 24 11:54:21 nikifor cupsd: Unknown directive DefaultAuthType on line 9. Oct 24 12:02:42 nikifor systemd: Started CUPS Printing Service. $ file /var/run/cups/cups.sock /var/run/cups/cups.sock: ERROR: cannot open `/var/run/cups/cups.sock' (No such file or directory)file /var/run/cups/cups.sock
If cups started via rc.d start cupsd, everything working ok.