printer problems

[Robert Holtzman]

On Thu, 30 Oct 2008, Lisa Kachold wrote:

> 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.

That command doesn't show a device. It returns two kernel drivers:

[holtzm at localhost]~$ locate usblp
/lib/modules/2.6.24-19-generic/kernel/drivers/usb/class/usblp.ko
/lib/modules/2.6.24-21-generic/kernel/drivers/usb/class/usblp.ko

Is that what you meant? Doesn't look like it.

>
> $ echo -en "\rHello\r\f" > $PATH/usblp
>
> And you forgot to tell us what it is whining about?

Other than the bitching about the printer not being connected we have 
this:

>
> $ tail /var/log/cups/error_log

[01/Nov/2008:07:37:44 -0700] cupsdAcceptClient: 9 from localhost 
(Domain)
D [01/Nov/2008:07:37:44 -0700] cupsdReadClient: 9 POST / HTTP/1.1
D [01/Nov/2008:07:37:44 -0700] cupsdAuthorize: No authentication data 
provided.
D [01/Nov/2008:07:37:44 -0700] Get-Jobs ipp://localhost/jobs/
D [01/Nov/2008:07:37:44 -0700] cupsdProcessIPPRequest: 9 status_code=0 
(successful-ok)
D [01/Nov/2008:07:37:44 -0700] cupsdReadClient: 9 POST / HTTP/1.1
D [01/Nov/2008:07:37:44 -0700] cupsdAuthorize: No authentication data 
provided.
D [01/Nov/2008:07:37:44 -0700] CUPS-Get-Printers
D [01/Nov/2008:07:37:44 -0700] cupsdProcessIPPRequest: 9 status_code=0 
(successful-ok)
D [01/Nov/2008:07:37:44 -0700] cupsdCloseClient: 9

>
> $ tail /var/log/message

In Ubuntu /var/log/messages mostly contains a lot of unintellible (at 
least to me) entries pertaining to, I think, internet traffic. Never 
have been able to decipher it. I can't see anything I can tie to 
printing or usb.

>
> 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

Bus 006 Device 004: ID 0baf:0303 U.S. Robotics
Bus 006 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 002 Device 003: ID 067b:2305 Prolific Technology, Inc. PL2305 
Parallel Port
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 046d:c018 Logitech, Inc.
Bus 001 Device 001: ID 0000:0000


>
> Many times with USB printers an attach and unattach or power change will cause a disconnect.
>
> Do the logs tell you anything?

Just that the printer is detected as I said in a previous post. A 
possible problem is that I may be missing something in the logs because 
I'm not sure (read "don't have a clue") what a lot of the entries mean.

-- 
Bob Holtzman
A fair fight is the result of poor planning.