USB devices dissapear: HAL shuts down on it's own

[Mikkel L. Ellertson]

Steven P. Ulrick wrote:
> 
> Hello Mikkel
> 	I am not running a USB hub of any kind.  In fact, I have never
> ran one before.  The printer plugs into a socket that is on a PCI/USB
> expansion card. The other two devices are connected to two USB ports
> that connect directly to the motherboard.
 >
You are running a hub, a couple of hubs, but they are built into the 
mother board, and the PCI/USB expansion card. From the lsusb output, 
it looks like the scanner and
> 	I just had a thought and I changed a few things around.  I
> plugged the scanner and the burner into the PCI expansion card, and
> plugged the printer into a port right by where I plug my USB keyboard
> into.  The thought was that the (probably) two problem devices have
> always been in the ports that connect directly to the motherboard.  It
> sure can't hurt to move them to different ports...
> 	This also might be of interest: I run a Abit KD7 motherboard
> and an Antec TrueBlue power supply (either 480 or 520 watts.  Can't
> remember off the top of my head.)
> 
I don't know about this board - it may have jumpers to select where 
the motherboard USB sockets get their power. I have seen it where 
you can jumper the socket to run off of an always-on supply, so the 
USB device can wake the system from suspend, or so you can have a 
power button on the keyboard that works to power the system up. This 
is usually a limited source. (+5VSB on my ASUS board.) The normal 
USB power is turned off when the system is suspended or powered off.
> 
> The only thing that my relatively unlearned eyes see is this: the first
> run of lsusb -v has this right at the beginning:
> can't get debug descriptor: Connection timed out
> 
> Bus 002 Device 004: ID 04b8:011b Seiko Epson Corp. Perfection 2400 Photo
> 
> The second run has the same warning, only it does not occur at the
> beginning.  BUT, it does occur during the part about the same device
> where it occured during the first run.  Could my scanner, which usually
> just sits there plugged in but unused, may be the item drawing too much
> power?  Just a Real Wild, Unlearned Guess...
> 
> Barring any great revelations from you or other members of this list,
> if I have this issue again with our devices plugged into their new
> locations, I will just unplug the scanner and see if it ever happens
> again.  BUT, if the scanner is flaky, I would like to know so I can get
> rid of it and get a new one :)
> 
> Thank you very much for your help thus far,
> Steven P. Ulrick
> 
 From a quick look at the output, the scanner should not be drawing 
too much, but it does look like it could be a problem. I will take a 
longer look at the output later.

Mikkel
-- 

   Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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