i386/55555: system freezes with access to /dev/ums0

[Alejandro de la Plaza]

>Number:         55555
>Category:       i386
>Synopsis:       system freezes with access to /dev/ums0
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Aug 13 11:30:15 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Alejandro de la Plaza
>Release:        FreeBSD 4.8-RELEASE i386
>Organization:
Universidad de Buenos Aires
>Environment:
System: FreeBSD micro0.fi.uba.ar 4.8-RELEASE FreeBSD 4.8-RELEASE #1: Mon Jul 28 14:37:51 ART 2003 root at micro0.fi.uba.ar:/usr/src/sys/compile/MICRO0 i386

Toshiba 320CT laptop PII 266MHz 64MB
Microsoft Wireless Optical Mouse Blue


>Description:

The systems freezes with any attempt to access /dev/ums0.
A power cycling (off/on) is required to recover.

dmesg lines related to usb ports:

>How-To-Repeat:
	

%cat /dev/ums0  

or

%moused -p /dev/ums0

>Fix:

unknown. 
Under proper guidance I can cooperate to find the problem.
>Release-Note:
>Audit-Trail:
>Unformatted:
 >>ohci0: <NEC uPD 9210 USB controller> mem 0xfcfff000-0xfcffffff irq 11 at devic
 e 11.0 on pci0
 >>usb0: OHCI version 1.0
 >>usb0: SMM does not respond, resetting
 >>usb0: <NEC uPD 9210 USB controller> on ohci0
 >>usb0: USB revision 1.0
 >>uhub0: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
 >>uhub0: 2 ports with 2 removable, self powered
 >>ums0: Microsoft Microsoft Wireless Optical Mouse\M-. 1.0A, rev 2.00/0.17, addr
  2, iclass 3/1
 >>ums0: 3 buttons and Z dir.
 
 'ubsd' and 'moused' are NOT running.
 It is irrelevan weather the mouse is plugged before or after boot.