At 08:47 AM 3/9/2012, Brian wrote:
On Fri 09 Mar 2012 at 08:35:59 -0500, Ethan Rosenberg wrote:
> Find New Printers - No Printers Found.
At
https://wiki.ubuntu.com/DebuggingPrintingProblems
there is some parallel port printer troubleshooting advice. You might
want to post the outputs of some of the suggested commands.
Brian -
Thanks.
Here it is:
* Make sure that the printer is connected to your system and powered on.
* Open a terminal/console and check if the lp, ppdev, and
parport_pc kernel modules are loaded:
* $ lsmod | grep lp
* rosenberg:/home/ethan# lsmod | grep lp
lp 12797 2
drm_kms_helper 22699 1 i915
drm 134178 3 drm_kms_helper,i915
parport 31254 4 parport_pc,ppa,lp,ppdev
i2c_core 19116 5 i2c_algo_bit,i2c_i801,drm,drm_kms_helper,i915
* $ lsmod | grep ppdev
rosenberg:/home/ethan# lsmod | grep ppdev
ppdev 12651 0
parport 31254 4 parport_pc,ppa,lp,ppdev
* $ lsmod | grep parport_pc
* rosenberg:/home/ethan# lsmod | grep parport_pc
* parport_pc 22036 1
* parport 31254 4 parport_pc,ppa,lp,ppdev
* Check if the kernel detected the parallel port during bootup:
* $ dmesg | grep par
rosenberg:/home/ethan# dmesg | grep par
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.008080] AppArmor: AppArmor disabled by boot time parameter
[ 0.268551] hpet0: 3 comparators, 64-bit 14.318180 MHz counter
[ 2.963413] mdadm: sending ioctl 800c0910 to a partition!
[ 2.963418] mdadm: sending ioctl 800c0910 to a partition!
[ 2.963437] mdadm: sending ioctl 1261 to a partition!
[ 2.963440] mdadm: sending ioctl 1261 to a partition!
[ 2.994627] mdadm: sending ioctl 1261 to a partition!
[ 2.994632] mdadm: sending ioctl 1261 to a partition!
[ 2.995494] mdadm: sending ioctl 1261 to a partition!
[ 2.995498] mdadm: sending ioctl 1261 to a partition!
[ 2.995693] mdadm: sending ioctl 1261 to a partition!
[ 2.995696] mdadm: sending ioctl 1261 to a partition!
[ 11.382306] parport_pc 00:0d: reported by Plug and Play ACPI
[ 11.382374] parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE]
[ 15.596219] mdadm: sending ioctl 800c0910 to a partition!
[ 15.596223] mdadm: sending ioctl 800c0910 to a partition!
[ 15.596236] mdadm: sending ioctl 1261 to a partition!
[ 15.596240] mdadm: sending ioctl 1261 to a partition!
[ 15.596898] mdadm: sending ioctl 1261 to a partition!
[ 15.596903] mdadm: sending ioctl 1261 to a partition!
[ 15.597242] mdadm: sending ioctl 1261 to a partition!
[ 15.597246] mdadm: sending ioctl 1261 to a partition!
[ 15.597615] mdadm: sending ioctl 1261 to a partition!
[ 15.597619] mdadm: sending ioctl 1261 to a partition!
[ 32.221937] lp0: using parport0 (interrupt-driven).
[ 32.420166] ppdev: user-space parallel port driver
[600923.340839] mdadm: sending ioctl 800c0910 to a partition!
[600923.340846] mdadm: sending ioctl 800c0910 to a partition!
[600923.340863] mdadm: sending ioctl 1261 to a partition!
[600923.340868] mdadm: sending ioctl 1261 to a partition!
[600923.341477] mdadm: sending ioctl 1261 to a partition!
[600923.341483] mdadm: sending ioctl 1261 to a partition!
[600923.341944] mdadm: sending ioctl 1261 to a partition!
[600923.341949] mdadm: sending ioctl 1261 to a partition!
[600923.342318] mdadm: sending ioctl 1261 to a partition!
[600923.342323] mdadm: sending ioctl 1261 to a partition!
[601268.620783] mdadm: sending ioctl 800c0910 to a partition!
[601268.620790] mdadm: sending ioctl 800c0910 to a partition!
[601268.620810] mdadm: sending ioctl 1261 to a partition!
[601268.620815] mdadm: sending ioctl 1261 to a partition!
[601268.621535] mdadm: sending ioctl 1261 to a partition!
[601268.621541] mdadm: sending ioctl 1261 to a partition!
[601268.621994] mdadm: sending ioctl 1261 to a partition!
[601268.622000] mdadm: sending ioctl 1261 to a partition!
[601268.622365] mdadm: sending ioctl 1261 to a partition!
[601268.622370] mdadm: sending ioctl 1261 to a partition!
* Check if the device files of the parallel port(s) are created
and have the correct permissions and ownerships:
* $ ls -l /dev/lp* /dev/parport*
* Check if the printer auto-detection result appears in the
kernel's virtual file system: <<BR> $ ls -l
/proc/sys/dev/parport/parport*/autoprobe*
* $ sudo cat /proc/sys/dev/parport/parport*/autoprobe*
* Find out if your printer gets detected by CUPS:
* $ lpinfo -v
rosenberg:/home/ethan# lpinfo -v
WARNING: gnome-keyring:: couldn't connect to:
/tmp/keyring-e42sxy/pkcs11: No such file or directory
network lpd
file cups-pdf:/
network ipp
network ipps
network http
network socket
network beh
network https
* Run the parallel port CUPS backend separately, once with
standard user privileges and once as root:
* $ /usr/lib/cups/backend/parallel
rosenberg:/home/ethan# /usr/lib/cups/backend/parallel
rosenberg:/home/ethan#
* $ sudo /usr/lib/cups/backend/parallel
* Attach the output of the above commands to the bug report.
ethan@rosenberg:/var/www/Webpages2$ usr/lib/cups/backend/parallel
-bash: usr/lib/cups/backend/parallel: No such file or directory
Note that problems cannot only caused by CUPS but also by the kernel
(package "linux"), HPLIP (package "hplip"), and several third-party
printer drivers.
.
Thanks again.
Ethan
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