Article View: alt.comp.periphs.webcam
Article #9Re: Help for USB hub and Webcam issue
From: chris_smith
Date: Tue, 25 Sep 2001 22:29
Date: Tue, 25 Sep 2001 22:29
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7210 bytes
ok I found the problem... but unfortunately it looks like i can't get a fix:
Electrostatic Discharge Disables Devices Plugged In To USB Hub
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The information in this article applies to:
Microsoft Windows 98
Microsoft Windows 98 Second Edition
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SYMPTOMS
When you use Universal Serial Bus (USB) devices connected to an external USB
hub, one or more devices plugged into the hub may suddenly stop working.
This problem is more likely to occur with external USB hubs that are powered
by an external power source (self-powered) than with USB hubs that are
powered by the USB bus itself (bus-powered). This problem does not occur
with devices that are plugged directly into the "root" hub built into the
computer itself.
CAUSE
This problem may occur if the USB hub receives an electrostatic discharge
(ESD, also known as a static electric shock). When an electrostatic
discharge occurs, Windows may be unable to properly restart an external USB
hub to recover from the error.
RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to
obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information on support costs, please go to the following
address on the World Wide Web:
http://support.microsoft.com/directory/overview.asp
NOTE: In special cases, charges that are normally incurred for support calls
may be canceled, if a Microsoft Support Professional determines that a
specific update will resolve your problem. Normal support costs will apply
to additional support questions and issues that do not qualify for the
specific update in question.
The English version of this fix should have the following file attributes or
later:
Date Time Version Size File name Platform
---------------------------------------------------------------
08/13/99 3:25pm 4.10.2223 36,672 Usbhub.sys Windows 98
Second Edition
WORKAROUND
To work around this problem after it occurs, unplug the external USB hub
from the computer or upstream hub, and then reconnect the external USB hub.
The hub is then redetected and its functionality restored.
STATUS
Microsoft has confirmed this to be a problem in Windows 98 and Windows 98
Second Edition.
MORE INFORMATION
There is currently no fix available for Windows 98 (first edition
"chris_smith" <chris_smith@ntlworld.com> wrote in message
news:Ck4s7.3439$L4.747363@news6-win.server.ntlworld.com...
>
> "Hornet" <hornet@roadrunner.net> wrote in message
> news:fOSr7.47705$B92.817400@news.easynews.com...
> > Do you know what type of chipset your motherboard uses? Possibly VIA?
Are
> > you using an AMD processor?
> >
> > Just a thought as these and other non Intel chipsets can cause major
> > headaches when using USB. Here is a good place to start troubleshooting-
> >
> > http://www.usbman.com/
> >
> >
> >
>
> Well unfortunately I know about the via problem. This is a IBM Thinkpad
770X
> and has an
> Intel processor and the Universal Host Controller entry under system is
> Intel 82371AB/EB
> PCI to USB.
>
> The device I am using works perfectly when I have it plugged straight into
> the USB port on
> the system. It always fails when I have the hub plugged.
>
> I have uninstalled and re-installed all drivers and noted the following
> stange thing happening:
>
> Uninstall drivers for webcam then reboot, then plug webcam -> drivers are
> installed for webcam then reboot
>
> Uninstall drivers for HUB, reboot then plug HUB --> drivers are installed
> for hub, reboot
>
> Now boot up with HUB only and then plug webcam in -> it installs drivers
> again!
>
> Why does it do this? Does this give a clue?
>
> I am at a loss now.
>
>
> Origial note attachment:
> >Hi guys,
> >
> >I have a Webcam Plus model that I have been using for six months without
a
> >problem.
> >
> >I recently decided to get cable. The cable uses my USB point so I needed
to
> >get a USB hub.
> >
> >I tried a Belkin pocket hub which went fine and I could plug in the cable
> >and the webcam into it. However as soon as I tried to access the webcam
> >when it was on the hub it would die. It would also kill the hub.
> >
> >I then called customer services who advised me that it was a bad hub. I
> >changed it for the same model. Same thing happened.
> >
> >I changed it for another Belkin hub and it did the same.
> >
> >I have now a Soho hub and although the cam always comes up when plugged I
> >find it gets killed as soon as I try to access it (netmeeting, yahoo,
> >dwyco.. whatever programs
> >that use the cam will result in the cam dying - light just goes out).
> >
> >I am at a loss to why this is. When I go back to using the non hub option
> >with dial up access it works perfectly....!
> >
> >Help help help!!!!!
> >
> >Please someone help!!!
> >
> >Thanks guys....!
> >
> >.
> >Now some more info.. I bought another USB cam... this time a Logitech
> cam.
> >This cam
> >does exactly the same. Works OK when directly plugged into my USB port
but
> >dies
> >on the USB hub....
>
>
>
>
>
>
>
Technical Details
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10b5d6,df3340deeb14da21 X-Google-Attributes: gid10b5d6,public X-Google-Thread: 107ea4,df3340deeb14da21 X-Google-Attributes: gid107ea4,public X-Google-Thread: 10a51e,34ae2d0ae3d680a2 X-Google-Attributes: gid10a51e,public X-Google-Thread: 100ed7,df3340deeb14da21 X-Google-Attributes: gid100ed7,public X-Google-ArrivalTime: 2001-09-25 15:35:44 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!newsfeed.google.com!sn-xit-02!supernews.com!news.tele.dk!small.news.tele.dk!212.74.64.35!colt.net!newspeer.clara.net!news.clara.net!news5-gui.server.ntli.net!ntli.net!news2-win.server.ntlworld.com.POSTED!not-for-mail From: "chris_smith" <chris_smith@ntlworld.com> Newsgroups: alt.comp.periphs.webcam,creative.misc,creative.products.video_blaster.webcam,microsoft.public.ddk.win9x.usb References: <obPr7.6401$KP.1205539@news2-win.server.ntlworld.com> <fOSr7.47705$B92.817400@news.easynews.com> <Ck4s7.3439$L4.747363@news6-win.server.ntlworld.com> Subject: Re: Help for USB hub and Webcam issue Lines: 178 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Message-ID: <fA7s7.4237$H4.658243@news2-win.server.ntlworld.com> Date: Tue, 25 Sep 2001 23:29:55 +0100 NNTP-Posting-Host: 62.255.151.238 X-Complaints-To: abuse@ntlworld.com X-Trace: news2-win.server.ntlworld.com 1001457035 62.255.151.238 (Tue, 25 Sep 2001 23:30:35 BST) NNTP-Posting-Date: Tue, 25 Sep 2001 23:30:35 BST Organization: ntl Cablemodem News Service