Public bug reported:
Binary package hint: cups
Description: Ubuntu 10.04 LTS
Release: 10.04
cups:
Installed: 1.4.3-1
Candidate: 1.4.3-1
Version table:
*** 1.4.3-1 0
500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
100 /var/lib/dpkg/status
I was attempting to set up my SiPix A6 serial printer on my new upgrade
of Lucid. Going through the system-config-printer application, the USB
serial port doesn't show up as an option. So, I picked other and used
"serial:/dev/ttyUSB0?baud=115200+bits=8+parity=none+flow=hard" as my
URI. The jobs normally hang out in the queue for a while then fail.
Looking at the CUPS logs, it's clear that the server can't even talk to
the printer.
Here are my error lines in the CUPS log for one attempt to print to the
printer.
E [29/May/2010:23:53:13 -0400] [Job 10] Unable to open device file
"/dev/ttyUSB0": Permission denied
E [29/May/2010:23:58:24 -0400] [Job 10] Unable to open device file
"/dev/ttyUSB0": Permission denied
E [30/May/2010:00:03:34 -0400] [Job 10] Unable to open device file
"/dev/ttyUSB0": Permission denied
E [30/May/2010:00:08:44 -0400] [Job 10] Unable to open device file
"/dev/ttyUSB0": Permission denied
E [30/May/2010:00:13:54 -0400] [Job 10] Unable to open device file
"/dev/ttyUSB0": Permission denied
E [30/May/2010:00:14:03 -0400] [Job 10] Job aborted after 5 unsuccessful
attempts.
I've tested this with setting the permissions on /dev/ttyUSB0 to full
open, 666, with the same results.
To do some further testing, I created a file the printer could read
following the instructions here: http://www.linuxforums.org/forum
/slackware-linux-help/126064-installation-sipix-pocket-printer-slax.html
I then ran the serial backend as root by hand and it works fine.
r...@myhost:/usr/lib/cups/backend# export
DEVICE_URI=serial:/dev/ttyUSB0?baud=115200+bits=8+parity=3Dnone+flow=hard
r...@myhost:/usr/lib/cups/backend# ./serial "5" "anonymous" "Test Page" "1"
"job-originating-host-name=localhost" "/tmp/test.bin"
STATE: +connecting-to-device
STATE: -connecting-to-device
PAGE: 1 1
DEBUG: Wrote 1152 bytes...
DEBUG: Wrote 1152 bytes...
DEBUG: Wrote 1152 bytes...
...
DEBUG: Wrote 1152 bytes...
DEBUG: Wrote 1152 bytes...
DEBUG: Wrote 764 bytes...
Please let me know if you need any further information from me.
** Affects: cups (Ubuntu)
Importance: Undecided
Status: New
--
USB attached serial ports have permissions problems
https://bugs.launchpad.net/bugs/587409
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