usb/76727: usb printing locks machine

[David Bremner]

>Number:         76727
>Category:       usb
>Synopsis:       usb printing locks machine
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 26 20:50:22 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     David Bremner
>Release:        FreeBSD 5.3-STABLE i386
>Organization:
University of New Brunswick
>Environment:
System: FreeBSD convex.cs.unb.ca 5.3-STABLE FreeBSD 5.3-STABLE #21: Tue Jan 25 14:51:02 AST 2005 bremner at convex.cs.unb.ca:/usr/obj/usr/src/sys/CONVEX2 i386


	
>Description:

	Intermittently, printing postscript files to a Lexmark E323
	via ulpt0 or unlpt0 will lock the machine. The X session on
	the console is frozen, and the machine is unresponsive to the 
	network.

	I have WITNESS and usb debugging compiled into the kernel.
	I don't have crash dumps setup, but it does not seem to crash
	per se.

>How-To-Repeat:

	Tricky. The same file when printed repeatedly will sometimes
	freeze, sometimes not.  It happens often enough to be annoying.
>Fix:

	At home, I switched my lexmark E321 to parallel port, and no
	crashes since then. At work I do not have that option.




>Release-Note:
>Audit-Trail:
>Unformatted: