Okay,
This is a horse of a different color (parallel port to USB adapter) [USB device]!
dmesg tells us that you are loading two USB devices - one is a bidirectional modem driver cdc_acm
Abstract Control Model driver for USB modems and ISDN adapters, the other is reported as:
[ 30.968766] usblp0: USB Bidirectional printer dev 4 if 0 alt 1 proto
2 vid 0x067B pid 0x2305 (conflicts with "no devices found"?)
[ 30.968854] usbcore: registered new interface driver usblp
Looks like that's our USB printer right there?
Try:
$ locate usblp
Stuff the path to the device file reported from slocated into $PATH below.
$ echo -en "\rHello\r\f" > $PATH/usblp
And you forgot to tell us what it is whining about?
$ tail /var/log/cups/error_log
$ tail /var/log/message
Might look like this:
Oct 28 20:02:38 honeypot kernel: [ 332.160000] usb 1-2: USB disconnect, address 8
And what does this tell you?
$ lsusb
Many times with USB printers an attach and unattach or power change will cause a disconnect.
Do the logs tell you anything?
> Date: Wed, 29 Oct 2008 17:29:10 -0700
> From: holtzm@cox.net
> To: plug-discuss@lists.plug.phoenix.az.us
> Subject: RE: printer problems
>
> On Mon, 27 Oct 2008, Lisa Kachold wrote:
>
> >
> > "The Zen of Troubleshooting {Grasshopper}"The error is the answer!
> >
> > "BJ210 Printer 'BJ210' may not be connected"Let's go look at each layer of a print connection:
> >
> >
> > A) Devices:
> >
> > How are you connecting your printer?
>
> It's a parallel port printer connected via a parallel port to USB
> adapter cable.
>
> >
> > 1) If your printer is Parallel port connected:
> >
> > If the printer is capable of direct ASCII text printing, the following
> > command as root should print a single page with the word
> > Hello on it:
> >
> > $ echo -en "\rHello\r\f" >/dev/lp0
> >
> > 2) via USB:
> >
> > $ dmesg | tail -n 50
> >
> > Do you see your printer?
>
> The thing that caught my eye was "lp: driver loaded but no devices
> found".
>
> > Do you see other usb devices?
>
> 30.901440] usbcore: registered new interface driver cdc_acm
> [ 30.901504] /build/buildd/linux-2.6.24/drivers/usb/class/cdc-acm.c:
> v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
> [ 30.968766] usblp0: USB Bidirectional printer dev 4 if 0 alt 1 proto
> 2 vid 0x067B pid 0x2305 (conflicts with "no devices found"?)
> [ 30.968854] usbcore: registered new interface driver usblp
>
> > If the printer is capable of direct ASCII text printing, the following
> > command as root should print a single page with the word
> > Hello on it:
> >
> > $ echo -en "\rHello\r\f" >/dev/usb/lp0---although you might not always see it print if it's not ASCII---
>
> This is weird:
>
> [holtzm@localhost]~$ echo -en "\rHello\r\f" >/dev/usb/lp0
> bash: /dev/usb/lp0: Permission denied
> [holtzm@localhost]~$ sudo echo -en "\rHello\r\f" >/dev/usb/lp0
> bash: /dev/usb/lp0: Permission denied
>
> Not even with sudo!
>
> [holtzm@localhost]~$ ls -l /dev/usb/lp0
> crw-rw---- 1 root lp 180, 0 2008-10-28 10:25 /dev/usb/lp0
>
> >
> > $ cat /proc/bus/usb/devices
>
> /proc/bus doesn't exist in Ubuntu, however there are a load of usb
> directories in /lib/modules and /lib/linux-restricted-modules
>
> >
> > If you are not successful with these commands, terminate all processes
> > that use /dev/usb/lp0. Use lsmod to check which USB
> > modules are loaded (usb-uhci, usb-ohci, or uhci)
> > and how they depend on each other. For instance, the following entry
> > in the output of lsmod shows that the module usbcore
> > is being used by modules printer and usb-uhci:
> > B) Cups and Networking
> >
> > Is the cupsd process running?
> >
> > $ tail /var/log/cups/error_log
> > $ ps -ef |grep cup
>
> [holtzm@localhost]~$ ps -ef |grep cup
> root 5532 1 0 09:59 ? 00:00:00 /usr/sbin/cupsd
>
> >
> > Is the port open or is something else in the way?
> >
> > $ netstat -anp |grep 631
>
> [holtzm@localhost]~$ sudo netstat -anp |grep 631
> [sudo] password for holtzm:
> tcp 0 0 127.0.1.1:631 0.0.0.0:*
> LISTEN 5532/cupsd
> tcp 0 0 127.0.0.1:631 0.0.0.0:*
> LISTEN 5532/cupsd
>
> >
> >
> > And VERIFY that the POWER is ON on your PRINTER!
>
> According to my original post:
>
> >> In case anyone wonders, the printer powers up, the physical
> connections
> >> are tight, and the requisite noises are heard when turning the power
> on
> >> or off.
>
> Having said all of the above (which pertains to Ubuntu ), as of this
> morning Debian began co-operating and I was able to print documents. I
> made no changes to anything.It must have been the goat I sacrificed last
> night. Ubuntu, however, continues to thumb it's nose at me. I think it's
> holding out for a virgin but I can't find any.
>
> Many thanks for the detailed reply
>
> --
> Bob Holtzman
> Your mail is being read by tight lipped
> Homeland Security agents who fail to see
> the humor in Doctor Strangelove
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