In message <43F4A740.5090005@tadpole.com>, "Garrett D'Amore" writes:
>You are saying PCMCIA, but your dump indicates USB. Am I missing something?
>

This is a Cardbus card that contains on it a USB hub; the rest of the 
electronics speak USB.  I assume they did that to make it easy to build 
two versions of the device, one that plugs in to a PCMCIA slot and one 
that plugs into a USB port.

>
>Steven M. Bellovin wrote:
>> I have a card that, on removal, sometimes crashes my machine.  The card 
>> is an EVDO modem:
>>
>> ohci0 at cardbus0 function 0: NEC USB Host Controller (rev. 0x43)
>> ohci0: interrupting at 11
>> ohci0: OHCI version 1.0
>> usb4 at ohci0: USB revision 1.0
>> uhub4 at usb4
>> uhub4: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
>> uhub4: 1 port with 1 removable, self powered
>> ohci1 at cardbus0 function 1: NEC USB Host Controller (rev. 0x43)
>> ohci1: interrupting at 11
>> ohci1: OHCI version 1.0
>> usb5 at ohci1: USB revision 1.0
>> uhub5 at usb5
>> uhub5: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
>> uhub5: 1 port with 1 removable, self powered
>> umodem0 at uhub4 port 1 configuration 1 interface 0
>> umodem0: Curitel Communications, Inc. Curitel Communications, Inc., rev 1.10
>/0.00, addr 2, iclass 2/2
>> umodem0: data interface 1, has CM over data, has break
>> umodem0: status change notification available
>> ucom0 at umodem0
>>
>> I run ppp over it.  (That has its own set of problems, but they're not 
>> the point of this note.)
>>
>> Anyway -- I of course kill pppd before removing the cards.  With 
>> moderate frequency, though -- say, about 10% of the time -- when I 
>> remove the card the laptop reboots.  As best I can tell, it's not going 
>> into ddb nor panicking, but since I've never seen any messages I can't 
>> be certain.  (Recently, I've started killing my Console window and 
>> switching to screen 1 before removing the card, to see if anything 
>> shows up.)  There definitely haven't been any dumps.  The question, 
>> then, is what would cause a machine to spontaneously reboot.
>>
>> My current working hypothesis is that it's a power glitch.  I'd like to 
>> be able to power down the slot before removing the card.  If necessary, 
>> I'm willing to power it back up manually when inserting a card, though 
>> it would nicer if I didn't have to worry about that.
>>
>> So -- how can this best be done?  (And does anyone have any better 
>> hypotheses about why the machine crashes?)
>>
>> 		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb
>>
>>   
>
>
>-- 
>Garrett D'Amore, Principal Software Engineer
>Tadpole Computer / Computing Technologies Division,
>General Dynamics C4 Systems
>http://www.tadpolecomputer.com/
>Phone: 951 325-2134  Fax: 951 325-2191
>


		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb