Message-ID: <3A0B27E3.7D10AB64@linux.com>
Date: Thu, 09 Nov 2000 14:40:36 -0800
From: David Ford <david@linux.com>
Organization: Blue Labs
MIME-Version: 1.0
To: "Dunlap, Randy" <randy.dunlap@intel.com>
CC: Greg KH <greg@wirex.com>, linux-kernel@vger.kernel.org
Subject: Re: [bug] usb-uhci locks up on boot half the time
In-Reply-To: <D5E932F578EBD111AC3F00A0C96B1E6F07DBDC82@orsmsx31.jf.intel.com>
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"Dunlap, Randy" wrote:

> > Either.  Currently bus (self) powered.  This hub has worked
> > fine on my other
> > computers without any adverse affect.
>
> Bus-powered != self-powered.

It had been a long day.  I really do know the distinction :)

It is currently bus powered and I've only once had it self powered
several months ago.  It is an SIIG 4 port hub, I hadn't seen any
complaints about it doing a web search when I looked, so I purchased it.

I have found that after unplug/plug the mouse and reboot, If I unplug
the hub then the boot will continue fine, if I unplug the just the mouse
(which is plugged into the hub), the machine will indeed hang.  If I
reset the power on the hub and plug it back in it will still hang.
I must reset the power on the motherboard.

The oddity is that kdb shows the machine to lock up on the popf in
pci_conf_write_word()+0x2c.  I never did get around to digging up this
routine and looking at the code, but I suspect this is a final return
from the routine.  I'm rather confused however, I have no idea why a
flags pop would hang the hardware.

-d

--
"The difference between 'involvement' and 'commitment' is like an
eggs-and-ham breakfast: the chicken was 'involved' - the pig was
'committed'."


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