Hi Richard
Thanks for the info. The hub that I was having the problem with is an
un-powered one.
However, after some trawling about on the net, I discovered that, by
default, in Windows XP, the USB ports attached to the motherboard have a
Power Management facility switched ON. Unfortunately, as Microsoft know,
it doesn't always reset completely when you send something to the
printer or whatever, but only when you use a hub, equipment plugged into
"original" ports are ok.
By de-selecting this option manually via Device Manager; USB Root;
Properties; Power Management, the ports don't "go to sleep" and thus the
problem disappeared.
It worked for me and when I told our IT lads at work, they had never
heard of this, so I don't think it's well documented.
Best regards, Pete Sowerby......
-----Original Message-----
From: PCBUILD - Personal Computer Hardware discussion List
[mailto:[log in to unmask]] On Behalf Of Richard Burdess
Sent: 03 February 2004 21:08
To: [log in to unmask]
Subject: Re: [PCBUILD] USB Hub Problems
hi
you did not mention if it was a powered hub or not, I had a very similar
problem with my 4 port hub, and after talking to a friend he lent me
his
powered hub to check against mine. Everything worked fine using his
then
when I connected mine back up, up came the problems, so try and find
someone
with a powered hub and try it.
One drawback they are 2 to 3 times the price and size but you may be
able to
find one at a reasonable price if you look around.
hope this helps
Richard
----- Original Message -----
From: "Pete Sowerby" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, February 02, 2004 2:35 PM
Subject: [PCBUILD] USB Hub Problems
> Hi there
>
> I've got a small 4 port USB hub that plugs into one of the USB ports
on my
PC. At the moment I have a digital camera/webcam and my Epson printer
connected via this.
>
> The problem is that although it works fine initially, it appears to
stop
working and my system fails to recognise it after it has been connected
for
a while.
>
> If I plug the equipment directly into the ports on the PC, there are
no
problem, so the ports are working fine, just when I add the equipment
via
this hub. On disconnecting and re-connecting, it works again, for a
while!!
>
> This is the second hub to have this problem (different makes each one)
so
all I can presume is that it's something else.
>
> The PC spec is:
> 1.6GHz AMD K6 Processor
> 256Mb RAM
> Windows XP Professional O/S
>
> Any advice would be appreciated.
>
> Best regards, Pete Sowerby...........
>
> PCBUILD's List Owners:
> Bob Wright<[log in to unmask]>
> Drew Dunn<[log in to unmask]>
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