DebuggingPrintingProblems
2032
Comment:
|
3527
merged in DebuggingPrintingErrors
|
Deletions are marked like this. | Additions are marked like this. |
Line 1: | Line 1: |
== I. Printer detection == | ||<tablestyle="float:right; font-size: 0.9em; width:30%; background:#F1F1ED; background-image: url('https://librarian.launchpad.net/1812570/bugsquad.png'); background-repeat: no-repeat; background-position: 98% 0.5ex; margin: 0 0 1em 1em; padding: 0.5em;">'''Contents'''[[BR]][[TableOfContents]]|| |
Line 3: | Line 3: |
=== USB printer === | = Printer detection = == USB printer == |
Line 13: | Line 15: |
=== Parallel port printer === | == Parallel port printer == |
Line 21: | Line 23: |
== II. Printingbuginfo == | = Printing bug info = |
Line 24: | Line 26: |
== III. CUPS error_log == | == CUPS error_log == |
Line 30: | Line 32: |
== Debugging printing errors == * Try both in GNOME and KDE and report whether the problem appears on both or only on one of them. This helps to identify where in the chain of printing program the error may be located. * Debugging CUPS [http://www.linux-foundation.org/en/OpenPrinting/Database/ErrorLogFAQ] * Find your printers' URIs : {{{ lpstat -v }}} * Restart cupsd : {{{ sudo /etc/init.d/cupsys restart }}} instead of {{{ killall -HUP cupsd }}} Info from the kernel: {{{ dmesg|grep lp0 }}} If it indicates that ECP is used, please switch to EPP in the BIOS setup and try again. If it doesn't show anything, do: {{{ sudo modprobe lp }}} and try again. * Configure your printer with the CUPS configuration page: type [WWW] http://127.0.0.1:631/ into any browser. = Known bugs = Description of known issues, how to recognise them and stock responses/actions. '''Open''' ||<rowbgcolor="#eeeeee"> '''Bug#''' || '''Description''' || '''Action''' || || TBD. || TBD. || TBD. || '''Closed''' ||<rowbgcolor="#eeeeee"> '''Bug#''' || '''Description''' || '''Action''' || || TBD. || TBD. || TBD. || ------ '''Also see:''' * DebuggingProcedures |
ContentsBRTableOfContents |
Printer detection
USB printer
- Make sure that the printer is connected to your system and powered on.
Open a terminal/console and check if the usb kernel modules are loaded: BR $ lsmod | grep usb
Unplug the USB printer cable from your computer and enter this command: BR $ tail -f /var/log/messages
- Reconnect the USB printer cable, you should see some messages appearing.
- Press Ctrl-C to stop the logging.
Find out if your printer gets detected by CUPS: BR $ lpinfo -v
- Attach the output of the above commands to the bug report.
Parallel port printer
- Make sure that the printer is connected to your system and powered on.
Open a terminal/console and check if the lp and ppdev kernel modules are loaded: BR $ lsmod | grep lp
Check if the kernel detected the parallel port during bootup: BR $ cat /var/log/messages | grep par
Find out if your printer gets detected by CUPS: BR $ lpinfo -v
- Attach the output of the above commands to the bug report.
Printing bug info
Attach the output of the printingbuginfo script for some useful information about your system related to printing like the version of Ubuntu you use, configured printers and the versions of important printing packages installed. The printingbuginfo script can be found here: https://wiki.ubuntu.com/PrintingBugInfoScript.
CUPS error_log
This is a file where CUPS writes information about what it is doing. Almost all printing problems can be diagnosed from the error log, so it is the first place to look to start solving problems. To be useful, you must change the logging level: BR
Edit the file /etc/cups/cupsd.conf, find the line LogLevel and change it to debug, save the file.
Restart CUPS: BR $ sudo /etc/init.d/cupsys restart
- Try to print something.
Attach /var/log/cups/error_log to the bug report.
Debugging printing errors
- Try both in GNOME and KDE and report whether the problem appears on both or only on one of them. This helps to identify where in the chain of printing program the error may be located.
Debugging CUPS [http://www.linux-foundation.org/en/OpenPrinting/Database/ErrorLogFAQ]
- Find your printers' URIs :
lpstat -v
- Restart cupsd :
sudo /etc/init.d/cupsys restart
instead of
killall -HUP cupsd
Info from the kernel:
dmesg|grep lp0
If it indicates that ECP is used, please switch to EPP in the BIOS setup and try again. If it doesn't show anything, do:
sudo modprobe lp
and try again.
Configure your printer with the CUPS configuration page: type [WWW] http://127.0.0.1:631/ into any browser.
Known bugs
Description of known issues, how to recognise them and stock responses/actions.
Open
Bug# |
Description |
Action |
TBD. |
TBD. |
TBD. |
Closed
Bug# |
Description |
Action |
TBD. |
TBD. |
TBD. |
Also see:
DebuggingPrintingProblems (last edited 2018-07-03 19:37:28 by vorlon)