Red Hat Bugzilla – Bug 196294
http backend failed error
Last modified: 2007-11-30 17:11:35 EST
Description of problem:
I am connecting an FC5 install (cups 1.2.1-1.2) to a FC4 prinst server (1.1.x)
the FC4 system prints fine locally, however, remote printing yields a "http
backend failed error" with an error about not having permissions on
/var/run/cups/certs/0. SeLinux disabled.
Version-Release number of selected component (if applicable):
worked fine with 1.1.x
Steps to Reproduce:
Install printer (Samsung ML-2010)
Try to print
cups 1.2.x seem to be giving a lot of distros fits. This particular problem
seems more similar to those experinced by users of Ubuntu Dapper Drake than
anything I have seen on FC5 forums
Please include the entire error message. Sounds like you are confusing two
message, one of them harmless.
Created attachment 131397 [details]
This is the error log. The message I described is toward the top of the file
Comment on attachment 131397 [details]
The error did not appear in that file. The error occurs on startup is:
D [22/Jun/2006:18:59:03 -0400] Loading attributes for job 7...
I [22/Jun/2006:18:59:03 -0400] Full reload complete.
I [22/Jun/2006:18:59:03 -0400] Listening to 127.0.0.1:631 on fd 0...
E [22/Jun/2006:18:59:03 -0400] Unable to set ACLs on root certificate
"/var/run/cups/certs/0" - Operation not supported
The message in comment #3 is harmless; ignore it.
The problem with the print job is that the final content type is being marked as
printer/Samsung, which the printer claims not to support.
Could you please attach the PPD you are using? Thanks.
Actually I don't think I need the PPD -- FINAL_CONTENT_TYPE shouldn't be set to
printer/Samsung regardless of that.
Created attachment 131442 [details]
PPD I was using gave a foomatic-rip error when I tried using it on the server
I tried building cups 1.2.1 on the server and the ppd was rejected
Please try this test update:
Does that fix the problem?
With the update the printer prints, however, instead of the document I get a
series of lines begining with PJL
That sounds like the wrong driver is selected. What printer model do you have,
and which PPD are you using to drive it?
I have a Samsung ML-2010. Samsung claims linux support, but it does not work on
up-to-date distros and linuxprinting.org doesn't have an exact match. I have
used ML-4500 and ML-1710 ppds from linuxprinting.org both worked with 1.1.x. I
have also used an unofficial ML-2010 ppd which I believe was a 1710 ppd modified
to correct margin issues.
The ppd is attached in comment #7
If that PPD worked with CUPS-1.1.x (comment #11) I can only think that it's a
gdi driver change in ghostscript. Please file a separate bug report against
The original problem (the FINAL_CONTENT_TYPE being wrongly set for backends) has
been fixed for the next update, so I'm closing this bug report.