Re: USB devices not being seen

2006-11-18 Thread Paul Brook
 This has happened with a mp3 player and two cell phones (a Motorola
 C650 and a Sony-Ericsson K750i), so it's not a problem with the device.
 What's strange is that the connection is detected by the devices: the
 mp3 player, for example, turns on and displays the usual screen shown
 when it's connected to the computer. I've even tried plugging it without
 the battery and it still turns on. Also, the K750i, when plugged,
 supposedly starts charging (which is the expected behaviour). However,
 even though it appears to be charging, when I left it plugged for a long
 time I noticed it did not appear to have charged anything.

Laptops sometimes only have low-power usb sockets. Both the devices you 
mention sound like they may require power over USB.
Try connecting the devices via a self-powered USB hub (ie. one with its own AC 
power supply).

Paul


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Re: USB devices not being seen

2006-11-18 Thread Eduardo M KALINOWSKI
Paul Brook wrote:
 This has happened with a mp3 player and two cell phones (a Motorola
 C650 and a Sony-Ericsson K750i), so it's not a problem with the device.
 What's strange is that the connection is detected by the devices: the
 mp3 player, for example, turns on and displays the usual screen shown
 when it's connected to the computer. I've even tried plugging it without
 the battery and it still turns on. Also, the K750i, when plugged,
 supposedly starts charging (which is the expected behaviour). However,
 even though it appears to be charging, when I left it plugged for a long
 time I noticed it did not appear to have charged anything.
 

 Laptops sometimes only have low-power usb sockets. Both the devices you 
 mention sound like they may require power over USB.
 Try connecting the devices via a self-powered USB hub (ie. one with its own 
 AC 
 power supply).
   
Well, it's a desktop computer. Motherboard is an Asus K8U-X, by the way.
And at least the mp3 player is no more than a pendrive with an lcd and a
couple buttons ;-) Never though these to be power-hungry devices.

On the other hand, I've just tried and in the same port that at the
moment does not see the mp3 player, a simple standard pendrive _is_ seen
and recognized.

-- 
If you can't be good, be careful.  If you can't be careful, give me a call.

Eduardo M KALINOWSKI
[EMAIL PROTECTED]
http://move.to/hpkb




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