usb/93155: /dev/ulpt0: device busy USB printer does not work

[Steve Davidson]

>Number:         93155
>Category:       usb
>Synopsis:       /dev/ulpt0: device busy   USB printer does not work
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Feb 10 23:00:17 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Steve Davidson
>Release:        5.4 Release
>Organization:
>Environment:
5.4 Release
USB printer attached -- this hardware works through Windows XP, so its not the cable or printer or USB port or power supply.              
>Description:
Any attampt to write to /dev/ulpt0 or /dev/unlpt0 returns "device busy".    

Some dmesg output:
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ulpt0: HP HP Business Inkjet 1000, rev 2.00/1.00, addr 2, iclass 7/1
ulpt0: using bi-directional mode

The relevant devices:

% ls -laq /dev/*lp*
crw-------  1 root  wheel     237,   0 Feb 10 13:53 /dev/lpt0
crw-------  1 root  wheel     237, 128 Feb 10 13:53 /dev/lpt0.ctl
crw-r--r--  1 root  operator  232,   0 Feb 10 13:53 /dev/ulpt0
crw-r--r--  1 root  operator  232,  64 Feb 10 13:53 /dev/unlpt0


Google research, bug searches, and FreeBSD usenet groups research suggests that MANY people have had this problem but no one has posted a solution.

The printer prints correctly from the same hardware when running under Windows XP.
>How-To-Repeat:
Attach a USB printer and send some data to it:

lptest > /dev/ulpt0
/dev/ulpt0: Device busy.

lptest > /dev/unlpt0
/dev/unlpt0: Device busy.

lptest > /dev/lpt0
/dev/lpt0: Device busy.


>Fix:
This could be a driver problem.              
>Release-Note:
>Audit-Trail:
>Unformatted: