Comment 36 for bug 997040
Revision history for this message
| Till Kamppeter (till-kamppeter) wrote Re: usb printer backend crashes | #36 |
© 2004
Canonical Ltd.
•
Terms of use
•
Data privacy
•
Contact Launchpad Support
•
Blog
•
Careers
•
System status
•
73416ba
(Get the code!)
Can you do this testing again and as soon as you get a hanging job, check whether the usblp kernel module is attached to the printer or not.
To do so,when starting the (cancel jobs, power-cycle printer) run the command:
ls -l /dev/usb/lp*
This should give at least one line of output (make sure usblp is not blacklisted). You can see which line corresponds to your printer via
sudo usb_printerid /dev/usb/lp0
sudo usb_printerid /dev/usb/lp1
...
Now print your jobs. You can observe that during data transfer of each job the line for your printer in
ls -l /dev/usb/lp*
disappears and reappears after completion of the data transfer to the printer.
As soon as a job hangs, DO NOT cancel it and run the commands
ls -l /dev/usb/lp*
ps auxwww | grep usb:
and post the output here. Does the line for your printer appear in the "ls -l /dev/usb/lp*" output?