rotormota 19:54 19 Oct 2004

I bought a Freecom EHD the other day & plugged it into my pc which has 6 USB2 ports but a message appeared saying the high speed device had not been connected to a high speed hub & to please use one of the ones listed. The list included my six USB2 ports of which 5 were occupied anyway.

Any ideas?


PS The Freecom is connected & working fine despite this issue.

  spikeychris 20:15 19 Oct 2004

You do have at least service pack 1 installed don't you?

  spikeychris 20:28 19 Oct 2004

If you do have 2P1 or 2 installed then type this into run..


Hit enter and under Universal Serial Bus Controllers Right-click the USB 2.0 EHCI Host controller, and then click Update Driver.

  TomJerry 20:30 19 Oct 2004

If one with usb 1, then all go for usb 1 if you use a hub.

If you use ports in motherboard, they are usually in pair, so one go usb1, another also go usb 1.

There are only a few usb hub models in the world which have true usb2 ability, i.e. mix usb1 with usb2.

  Dorsai 20:31 19 Oct 2004

Try swapping a device you know works, but not the modem (dont want to get disconnected from net) into the port you tried the HDD in. If this works, then put the HDD in the port now vacant..

Idea, Shot in dark.

mahaps a lack of power on the root hub that had the free port??

  spikeychris 20:41 19 Oct 2004

TomJerry your comment "There are only a few usb hub models in the world which have true usb2 ability, i.e. mix usb1 with usb2." You have lost me with that, what do you mean?

  TomJerry 20:50 19 Oct 2004

what I meant is mix usb1 with usb2 devices make all go usb1. Truely usb2 share should make usb2 work usb2 even mixed with usb1.

  spikeychris 21:05 19 Oct 2004

Hi-Speed and Low-Speed USB devices can coexist nicely on USB 2.0 hubs.

  rotormota 21:06 19 Oct 2004

Spikey, I did what you said but there are none listed as USB 2.0 EHCI Host controller?

  TomJerry 11:31 20 Oct 2004

yes, they are but all work on low speed

  spikeychris 14:22 20 Oct 2004

TomJerry I can see where you are comming from, its the same with RAM, as in it defaults to the lowest speed. However I was under the impression that you may mix low-speed, full-speed, and high-speed devices on a single hub without reducing the performance of the higher speed devices. Obviously the computer port must be 2.0. The hub was designed to not penalize users mixing older and newer technology. The USB2 hubs use a TT controller that allows each device its own bus.

click here and see if this helps.

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