Red Hat Bugzilla – Bug 416101
unable to print after configuring printing in KDE
Last modified: 2015-07-13 13:36:39 EDT
Description of problem: I tried to print to a printer discovered on the local network, but attempts to print a test page failed. After enabling debug logging in /etc/cups/cupsd.conf, I was able to determine that the problem was local to my AMD64 system - it was looking for the ipp driver in /usr/lib64/cups/backend/ but there was no such directory - all the [64-bit] backends are in /usr/lib/cups/backend/. Version-Release number of selected component (if applicable): cups-1.2.12-8.fc7 kdelibs-3.5.8-7.fc7 How reproducible: At least once Steps to Reproduce: 1. use KDE print configuration tools to configure CUPS 2. configure remote printer from another system using CUPS (manually, or by discovery) 3. restart cups 4. try to print test page Actual results: Nothing prints, following errors in /var/log/cups/error_log: I [07/Dec/2007:13:44:31 -0500] Started backend /usr/lib64/cups/backend/ipp (PID 23639) for job 2. E [07/Dec/2007:13:44:31 -0500] PID 23639 (/usr/lib64/cups/backend/ipp) stopped w ith status 22! I [07/Dec/2007:13:44:31 -0500] Hint: Try setting the LogLevel to "debug" to find out more. I [07/Dec/2007:13:44:31 -0500] [Job 2] Backend returned status 22 (unknown) and with debug turned on: I [07/Dec/2007:14:02:27 -0500] Started backend /usr/lib64/cups/backend/ipp (PID 23914) for job 4. D [07/Dec/2007:14:02:27 -0500] Discarding unused job-state event... D [07/Dec/2007:14:02:27 -0500] cupsdProcessIPPRequest: 11 status_code=0 (success ful-ok) D [07/Dec/2007:14:02:27 -0500] [Job 4] /usr/lib64/cups/backend/ipp: No such file or directory ... D [07/Dec/2007:14:02:27 -0500] [Job 4] File 0 is complete. I [07/Dec/2007:14:02:27 -0500] [Job 4] Backend returned status 22 (unknown) D [07/Dec/2007:14:02:27 -0500] Discarding unused job-stopped event... D [07/Dec/2007:14:02:28 -0500] Unloading job 4... Expected results: test page printed Additional info: Workaround - I was able to workaround this by creating a symlink: ln -s ../lib/cups /usr/lib64/cups Later, I discovered that /etc/cups/cupsd.conf had the following line: ServerBin /usr/lib64/cups and I replaced this with ServerBin /usr/lib/cups and removed the symlink. I suspect that this problem actually resulted from the use of KDEPrint to set up the /etc/cups/cupsd.conf file, based on the comment at the start of the file: # CUPS configuration file, generated by CUPS configuration tool. # This tool is part of KDEPrint, the printing framework for KDE # since version 2.2.2 and is used by the CUPS supporting module # in KDEPrint. The predecessors to KDEPrint in former KDE releases # were KUPS and QtCUPS; they are deprecated and no longer maintained. # # Author: Michael Goffioul # # Web site: http://printing.kde.org/ # ######################################################################## # # # This is the CUPS configuration file. If you are familiar with # # Apache or any of the other popular web servers, we've followed the # # same format. Any configuration variable used here has the same # # semantics as the corresponding variable in Apache. If we need # # different functionality then a different name is used to avoid # # confusion... # # # ########################################################################
In short, kde cups configurator is broken (on 64 bit platforms anyway). don't use it. system-config-printer is the way to go. See also bug #230979 (pretty much a dup)
Yes, this is pretty much a duplicate - but I didn't find bug 230979t when I searched since I restricted component to cups. I'm still using the KDE configuration tools - once the ServerBin is explicitly set in /etc/cups/cupsd.conf, the bogus default is not a problem any more, since the KDE config tools do read and parse the /etc/cups/cupsd.conf file. Having ServerBin specified *explicitly* as /usr/lib/cups in the default /etc/cups/cupds.conf in the cups RPM (since this value is *not* architecture specific) would prevent the problem - which is a KDE bug, I am willing to admit; it's just that it might be easier to fix/workaround in CUPS until it gets fixed in KDE. @alex
Excellent investigative work, many Thanks. Knowing that, it shouldn't be rocket science for us to change/fix kde's default value too for ServerBin
*** This bug has been marked as a duplicate of 230979 ***
Will be fixed in 3.5.9-2