"Henry" said in news:c39ked$qpf$1@hercules.btinternet.com:
> Hi guys and gals.
>
> I have a new build PC and am p*ssed that the USB thing does not work
> properly. Particularly as I had intended to build the PC as basic as
> possible and to connect peripherals via USB instead of having them
> built in. The PC only has floppy and DVD drive inside the case.
> Burner, scanner, hub, card reader, handspring docker, webcam and adsl
> modem etc are all USB devices. I have no PCI cards installed
>
> With no other USB devices connected, sometimes when I connect the card
> reader (Hama 6 way) it is recognised and the 4 drives appear. I then
> disconnect (by pulling the USB plug) and the device goes. If I try and
> re-insert, the machine freezes. I can move the mouse but the
> processor is 100% utilised and I can't do anything. If I remove the
> reader I sometimes get BSOD.
>
> Have tried removing all USB hub drivers etc and letting them be
> re-loaded but this does not cure.
>
> Have tried disabling serial ports in BIOS to release INTs but no good.
>
> I have another PC with same motherboard and spec but with one stick
> corsaire memory 512 and this PC works fine with the same device !
>
> Isn't it about time that USB worked OK. I have seen web postings to
> say that 'USB operation on Abit mobos is a bit tempremental with some
> configurations'. Is that true ? Have I made the wrong choice ?
>
> Any advice or comments will be most welcome.
>
> Hank
>
> Virgo Case
>
> Antec True 430 PSU (mutts nuts)
>
> Corsair 2 x 512, 3200
>
> 2700 XP Processor (retail fan)
>
> MSI FX5200 128Mb AGP card (not a gamer !)
>
> No overclocking
>
> DVD
>
> Floppy
>
> Windows XP home retail (mug)
>
> Thomson speedtouch 330 ADSL Modem
>
> Logitech Quickcam Messenger
>
> Belkin 7 port USB hub
PRB: USB Port May Stop Working After Removing or Inserting USB Device
<a style='text-decoration: underline;' href="http://support.microsoft.com/?kbid=817900" target="_blank">http://support.microsoft.com/?kbid=817900</a>
FIX: Fast Swap of USB Devices May Cause USB Host Controller to Stop
Functioning on Windows XP
<a style='text-decoration: underline;' href="http://support.microsoft.com/?kbid=816843" target="_blank">http://support.microsoft.com/?kbid=816843</a>
USB Devices May Not Work After You Unplug a Downstream USB Hub from the
Host Controller
<a style='text-decoration: underline;' href="http://support.microsoft.com/?kbid=810400" target="_blank">http://support.microsoft.com/?kbid=810400</a>
The computer stops responding during startup
<a style='text-decoration: underline;' href="http://support.microsoft.com/?kbid=832577" target="_blank">http://support.microsoft.com/?kbid=832577</a>
"Because Windows XP SP1 does not support the USB 2.0 Legacy BIOS, the
USB 1.1 device driver does not work correctly."
General USB Troubleshooting in Windows XP
<a style='text-decoration: underline;' href="http://support.microsoft.com/?kbid=310575" target="_blank">http://support.microsoft.com/?kbid=310575</a>
These were found when searching <a style='text-decoration: underline;' href="http://support.microsoft.com/" target="_blank">http://support.microsoft.com/</a> on "usb
stop device" (all words) for Windows XP. There were more articles found
but you can perform the search yourself, and also try other search
strings. I was actually trying to find info on how you are supposed to
stop the USB device *BEFORE* you unplug it.
Looks more to be a defect in Windows than in the hardware or the driver.
Also, most users seem to forget that there is a limited amount of power
available from the USB ports. They keep slapping on more USB
peripherals while using a passive hub until USB becomes flaky. Yes, USB
can support up to 127 concurrently connected devices. That doesn't mean
that a single or paired ports are going to supply to current demands for
them all. A pair of USB ports (each USB root hub controller provides 2
ports) can provide a shared load of 500 mA. I have an Abit NF7-S v2
mobo which has 3 USB controllers to provide 3 pairs (6) USB ports but
the 500 mA limitation exists on each pair of USB ports. I believe to be
considered a lower-powered USB device means it sucks up less than 100
mA. USB-to-Ethernet converters suck up 150 mA and USB digital
headphones often suck up more than 100 mA so they are high-powered USB
devices. So watch how much of a current load you are putting on the USB
ports. Use a powered USB hub rather than a passive one.
--
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