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Yesterday, I did a general update (-Syu) and since then my printer stopped working.
The error message I get in CUPS web interface is "/usr/lib/cups/backend/hp failed"
I tried all the remedies on the forums and the wiki, including changing the cups.conf file, removing the printer/re-adding it, installing avahi-daemon.
Nothing seems to be working.
The printer worked perfectly until yesterday, so I am inclined to think the update changed something, perhaps a permission, perhaps a new driver.
Has anyone experienced similar problems? The printer is a HP Laserjet 1320, connected to the USB port. I tried different drivers, such as Hp and foomatic.
Any help is appreciated
Stefano
Last edited by stefano (2011-12-16 22:46:43)
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Is /usr/lib/cups/backend/hp runable? Maybe there is a dependency problem:
ldd /usr/lib/cups/backend/hp | grep 'not found'Try as root to run /usr/lib/cups/backend/hp and see what happens.
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/usr/lib/cups/backend/hp seems to be runnable. This is what I get if I run either as as regular user or as root:
direct hp:/usb/hp_LaserJet_1320_series?serial=00CNDC521161 "HP LaserJet 1320 series" "HP LaserJet 1320 series USB 00CNDC521161 HPLIP" "MFG:Hewlett-Packard;MDL:hp LaserJet 1320 series;CLS:PRINTER;DES:hp LaserJet 1320 series;SN:00CNDC521161;"
Unfortunately, I have no idea what that means
Stefano
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[SOLVED]
I think the problem was with the permission on the device file associated with the printer.
After a lot of googling around, I found this page on the Debian site: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=556406 which explained how to diagnose the problem by looking at CUPS' error log
Arch's wiki page on CUPS, at the section CUPS 1.4 (https://wiki.archlinux.org/index.php/CU … CUPS_1.4.x) , in turn, explained how to find out the usb node for the printer (lsusb) and what to do. Notice that the wiki page is partially misleading since it has a different section on "HPLIP printer sends /usr/lib/cups/backend/hp failed". But the suggestions mentioned there did not help.
As soon as I changed the permission to 666 the printer started working again (even though the device file was set to root:lp with permissions 664, and that should have worked).
Caveat: I had previously installed hp-plugin from AUR and installed the correct (latest) plugin for hplip. Even though that, by itself, did not help, it may have contributed to the final solution.
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