Easylogger not enumerated on one computer

[iphi]

Hi,

I have a problem with Easylogger on one specific computer:

While the device works fine on most computers, it is not recognized/not enumerated on any of 8 USB outlets on one specific computer (WinXP like all other tested ones). All outlets work fine with other USB devices like a mouse.

Strange thing:
When I leave the device connected and I reboot the machine, then it is recognized. But unplugging and replugging it then will cause detect failure again.

Does anybody have a clue for the reason and for remedy?

Thanks,
Tom

[iphi]

I'm still desperately searching for the reason why this happens.
Can't anybody give a hint on a search strategy for the cause of the enumeration failure?

What can be learned from the fact that enumeration works if the system is rebooted with the device plugged in, but not when un- and replugged?

Thanks, Tom

[christian]

This is most likely a voltage level problem. Please check the voltage level on D- in idle mode.