Re: multi port USB hubs question

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

Did you USB hub have its own external power supply ? If it did not then you have discovered your problem. If the hub is not using an external supply then ALL its power is coming from the one USB port and being divided among the ports in use. In your case you need two powered ports and with the USB hub are getting only power from one.
(Hubs destined for use with desktops usually include a power plug wart thing, those destined for laptops often don't have a provision for external power.)

You can get information on power available and used on USB hubs from
device manager
Universal Serial bus controllers
the various USB Root Hub entries

Michael


"Walter Goldschmidt" <wgold@xxxxxxxxxx> wrote in message news:heq17s$18av$1@xxxxxxxxxxxxxxxxxxxxxxx
I recently received a multi port USB hub and plugged it into my laptop. It seemed like a good idea as I only had 2 USB ports on my computer. This gave me 4 where before I only had 1 which made a total of 5. I plugged a new external DVD burning drive into one of the multi ports ports. The drive used 2 ports, 1 for drive and 1 for drives power. I also plugged 2 external hard drives into the other 2 ports. The burning drive would not work and 1 of the external hard drives was not detected in computer. I worked on this problem all day surfing web for answers and finally got online with Microsoft support and chatted with a tech. He took control of my computer and did some troubleshooting for 3 hours. Nothing he did helped. I got to thinking about the multi port USB hub and unplugged it from computer. Then I plugged the burning drive directly into the computer using both USB ports on computer. It worked flawlessly. Is this typical of these hubs or do I just have a cheap one and need a better one. I think my ports on my computer weren't generating enough power to run all the devices. Any information on this would be very helpful.

Walt

.

Relevant Pages

  • RE: Is there a port or USB device limit?
    ... power being supplied on those ports, get a USB hub that has it's own power ... I don't know much about ports & ... USB devices, but i have a lot of 'stuff' connected externally. ...
    (microsoft.public.windowsxp.general)
  • Bad Day (was: *Beats head off desk*)
    ... light is on, the USB hub is working, but the screen is kaput. ... I hit four stores - two consumer electronics, ... The server right away recognizes the new resolution, ... power button. ...
    (alt.games.warcraft)
  • RE: Is there a port or USB device limit?
    ... power being supplied on those ports, get a USB hub that has it's own power ... I don't know much about ports & ...
    (microsoft.public.windowsxp.general)
  • Re: System Dead after Standby, no POST on reboot
    ... It seems my problem was caused by the AC power adapter plugged into the ... The system woke up from Standby this morning with no problem. ... I unplugged my external USB hub -- this is where I attach three external ... I have the latest BIOS for my MB. ...
    (microsoft.public.windowsxp.hardware)
  • ~ USB HUB ~
    ... computers share usb hub usb hub host driver win98 usb hub usb hub ... driver in-desk usb hub 2 inch usb 2 0 port hub enermax usb hub via pci ... usb hub 2 port usb hubs tripplite 4 port usb hub keyboard usb hub blue ... powered hub usb hub power limits review of belkin 4-port usb hub miri ...
    (sci.chem.electrochem.battery)