Not enough power USB on Portege M200?

Whenever I try on my Portege m200 portable USB devices, they do not work as long as they operate in a mode powered by bus, for example without external power. I wonder if the Portege does not offer enough USB power for some devices.

Here is what I tried:
(1) Freecom FS 50 - a slimline dvd burner comes with 2 usb cables. According to Freecom they will be powered by usb simply by adding the power of 2 usb ports. Result: The drive is not yet seen in my m200. Using of external power supply, the drive works by usb as expected.
(2) pinnacle PCTV 200e - external dvb - t receiver. Is recognized, but produces errors in any receiver software I've tried. However working on the FUSi Lifebook S series.

Can anyone confirm the waekness of USB ports? Suggestions or tweaks plus a train external powered usb hub?



The USB ports provide 500mA. It is a standard USB. If the external USB devices need more power than USB ports allow in most cases the external power supply is required.
You can also try plugging the USB hub with an external power supply, then connect the external USB devices to the USB hub.

In addition, you can try to change the settings in the properties of the USB root hub.
Go to the device manager select USB hub root, select properties and go to the power management tab.
Here, you can disable the option: "allow the computer to turn off this device?

Tags: Toshiba

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