From: Hal Murray
[]
As I understand it, the problem with USB on the Raspberry Pi is that the
new/second version left out the current limiting on the power to the USB
connectors.  So when you plug in a device, there will be a glitch on the 5V
power rail as the empty filter caps get charged up.  So if you don't plug
things in, it should work OK.

You might also get lucky if the caps on your devices are small or you have
long USB cables or you have a solid power supply for your Raspberry Pi or ...
===========================

I've heard that as well. The majority of my own usage has been with devices which are permanently attached, although the Wi-Fi dongle and TV receiver dongle I mentioned have been unplugged and re-plugged without issue. My PSU is well over the minimum spec. I wouldn't expect an NTP server to be having devices continually added and removed, either....

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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