Certain applications not printing to Epson WF-4740 with cups

jrayner · 11-17-2019, 02:27 PM

Why do the following applications not print? Printer WF-47 clicks but no output. I have not tested other applications.
Comparison of output of two printers below. Unfortunately I cannot reproduce proper spacing of following table in my post.

Printing Issues from Fedora-31 using ethernet (static IP) and cups

Application=====================Epson===========Epson
============================WorkForce 840===WorkForce WF-4740
=============================================================

test page========================yes=============yes

emacs======color text=============yes=============yes

gedit======color text=============yes==============no
===========black+white text=======yes==============no

shotwell===color jpg===============yes==============no

GIMP=======color jpg===============yes==============no

okular=====color jpg (as above)=========yes==============yes
===========color text(as above)========yes==============yes
===========color pdf=================yes==============yes

Typical Error message:** (org.gnome.gedit:88188): WARNING **: 10:52:56.416: GDBus.Error

rg.freedesktop.Avahi.TimeoutError: Timeout reached

ferrari · 11-18-2019, 12:37 AM

Interesting that the GTK apps seem to be affected. I assume these two printers are using different drivers, and perhaps the underlying CUPS workflow (ie filter chain) is the culprit here. Okular will be generating and sending a PDF file for printing. I'm not sure about Gimp and Shotwell though. You could examine the CUPS error_log (with CUPS in debug-logging mode) to see which filters are involved for a given print job as I've outlined in this post:

https://www.linuxquestions.org/quest...4/#post6056875

Don't be daunted by this process. It should help identify where the problem is occurring.

This command can be used to get the configured drivers for the respective printers:

Code:

sudo egrep -i "name|model|filter" /etc/cups/ppd/*

I assume that this will show each printer is using a different Epson filter.

Fedora printer troubleshooting guide:
https://fedoraproject.org/wiki/How_t...nting_problems

jrayner · 11-18-2019, 08:48 AM

Thank you. Tried debugging
# cupsctl --debug-logging
--print attempt with gedit--
# cat /var/log/cups/error_log |egrep -iA4 "filter|error"
no output

ferrari · 11-18-2019, 12:17 PM

I don't know why you don't get any such output. You could try removing the existing error_log file and restart CUPS then attempt to print again.

Can you show us how your printers are configured please? See the command given last post.

As an example, I get output like this (even without such a printer being present)...

Code:

D [19/Nov/2019:07:12:06 +1300] [Client 45] Server address is "/run/cups/cups.sock".
--
D [19/Nov/2019:07:12:06 +1300] [Job 41] 3 filters for job:
D [19/Nov/2019:07:12:06 +1300] [Job 41] pdftopdf (application/pdf to application/vnd.cups-pdf, cost 66)
D [19/Nov/2019:07:12:06 +1300] [Job 41] gstoraster (application/vnd.cups-pdf to application/vnd.cups-raster, cost 99)
D [19/Nov/2019:07:12:06 +1300] [Job 41] /opt/epson-inkjet-printer-escpr/cups/lib/filter/epson-escpr-wrapper (application/vnd.cups-raster to printer/Epson, cost 0)
D [19/Nov/2019:07:12:06 +1300] [Job 41] job-sheets=none,none
D [19/Nov/2019:07:12:06 +1300] [Job 41] argv[0]="Epson"
D [19/Nov/2019:07:12:06 +1300] [Job 41] argv[1]="41"
D [19/Nov/2019:07:12:06 +1300] [Job 41] argv[2]="dean"
--
D [19/Nov/2019:07:12:06 +1300] [Job 41] envp[9]="PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin"
D [19/Nov/2019:07:12:06 +1300] [Job 41] envp[10]="SERVER_ADMIN=root@linux-4k1z"
D [19/Nov/2019:07:12:06 +1300] [Job 41] envp[11]="SOFTWARE=CUPS/2.2.7"
D [19/Nov/2019:07:12:06 +1300] [Job 41] envp[12]="TMPDIR=/var/spool/cups/tmp"
D [19/Nov/2019:07:12:06 +1300] [Job 41] envp[13]="USER=root"
--
I [19/Nov/2019:07:12:06 +1300] [Job 41] Started filter /usr/lib/cups/filter/pdftopdf (PID 4512)
I [19/Nov/2019:07:12:06 +1300] [Job 41] Started filter /usr/lib/cups/filter/gstoraster (PID 4513)
I [19/Nov/2019:07:12:06 +1300] [Job 41] Started filter /opt/epson-inkjet-printer-escpr/cups/lib/filter/epson-escpr-wrapper (PID 4514)
I [19/Nov/2019:07:12:06 +1300] [Job 41] Started backend /usr/lib/cups/backend/socket (PID 4515)
D [19/Nov/2019:07:12:06 +1300] Discarding unused job-state-changed event...
D [19/Nov/2019:07:12:06 +1300] [Client 45] Returning IPP successful-ok for Print-Job (ipp://localhost:631/printers/Epson) from localhost
D [19/Nov/2019:07:12:06 +1300] [Client 45] Content-Length: 192

jrayner · 11-20-2019, 03:33 PM

Here is my setup:

/etc/cups/ppd/EP4740.ppd:*PCFileName: "drvless.ppd"
/etc/cups/ppd/EP4740.ppd:*ModelName: "EPSON WF-4740 Series"
/etc/cups/ppd/EP4740.ppd:*NickName: "EPSON WF-4740 Series, driverless, cups-filters 1.22.5"
/etc/cups/ppd/EP4740.ppd:*ShortNickName: "EPSON WF-4740 Series"
/etc/cups/ppd/EP4740.ppd:*cupsFilter2: "image/pwg-raster image/pwg-raster 0 -"
/etc/cups/ppd/EP4740.ppd:*cupsFilter2: "image/urf image/urf 100 -"
/etc/cups/ppd/EP4740.ppd:*cupsFilter2: "image/jpeg image/jpeg 0 -"
/etc/cups/ppd/EP4740.ppd:*OpenUI *ColorModel/Print Color Mode: PickOne
/etc/cups/ppd/EP4740.ppd:*OrderDependency: 10 AnySetup *ColorModel
/etc/cups/ppd/EP4740.ppd:*ColorModel RGB/Color: "<</cupsColorSpace 19/cupsBitsPerColor 8/cupsColorOrder 0/cupsCompression 0>>setpagedevice"
/etc/cups/ppd/EP4740.ppd:*ColorModel Gray/Monochrome: "<</cupsColorSpace 18/cupsBitsPerColor 8/cupsColorOrder 0/cupsCompression 0>>setpagedevice"
/etc/cups/ppd/EP4740.ppd:*DefaultColorModel: RGB
/etc/cups/ppd/EP4740.ppd:*CloseUI: *ColorModel

Removed all files under /var/log/cups. Ran gedit as before. Still no printed output from gedit or any error output.

(Are you in Auckland? Came here, USA, from U.Canterbury)

ferrari · 11-21-2019, 02:14 AM

Ok, so you're using "driverless printing" as described here:
https://wiki.debian.org/CUPSIPPEverywhere
https://www.systutorials.com/docs/li.../1-driverless/

I have no experience with this (I don't own any IPP Everywhere-capable printer hardware), however I've seen a few reports such as this one where users have found that it doesn't work for one reason or another. The answer to why GTK apps are impacted may well lie with this comment from Till Kamppeter...
https://bugs.launchpad.net/ubuntu/+s...25/comments/20

Ultimately, you may also need to submit a bug report for this
https://fedoraproject.org/wiki/How_t...for_bug_report

Quote:

(Are you in Auckland? Came here, USA, from U.Canterbury)

Yes, Auckland-based.

jrayner · 11-21-2019, 02:20 AM

Thanks again. Will try your suggestions. <rayner.2@osu.edu>

ferrari · 11-21-2019, 02:29 AM

See if anything helpful offered in that bug report. I haven't had time to digest it completely. Let us know how you get on.

Alternatively you could consider configuring with an Epson CUPS driver...
https://download.ebz.epson.net/dsc/s...search/?OSC=LX

tofino_surfer · 11-21-2019, 11:50 AM

Quote:

Unfortunately I cannot reproduce proper spacing of following table in my post.

You need to use CODE blocks to preserve spaces. Switch to advanced mode and press the # icon. Put your text between the two delimiters.

For example with manpage ouput all of the spacing is preserved.

Code:

GAWK(1)                                                                           Utility Commands                                                                          GAWK(1)

NAME
       gawk - pattern scanning and processing language

SYNOPSIS
       gawk [ POSIX or GNU style options ] -f program-file [ -- ] file ...
       gawk [ POSIX or GNU style options ] [ -- ] program-text file ...

DESCRIPTION
       Gawk is the GNU Project's implementation of the AWK programming language.  It conforms to the definition of the language in the POSIX 1003.1 standard.  This version in turn
       is based on the description in The AWK Programming Language, by Aho, Kernighan, and Weinberger.  Gawk provides the additional features found in the current version of Brian
       Kernighan's awk and numerous GNU-specific extensions.

       The  command  line consists of options to gawk itself, the AWK program text (if not supplied via the -f or -i options), and values to be made available in the ARGC and ARGV
       pre-defined AWK variables.

       When gawk is invoked with the --profile option, it starts gathering profiling statistics from the execution of the program.  Gawk runs more slowly in this mode,  and  auto‐
       matically produces an execution profile in the file awkprof.out when done.  See the --profile option, below.