Ludwig Balke wrote:
2. which reasons ar possible for the message "already running port x disabled by hub (EMI?), re-enabling...". Is it always electromagnetic interference?
Not always. Anything with an external power source that is attached to the computer is suspect. ...
... Without a good ground reference, most data busses cannot work reliably.
Sounds like it'd be better if the diagnostic mentioned ground faults as another possibility ... maybe saying "EMI or ground fault?". Or maybe using device power configuration (bus- vs self- power) to choose which diagnostic to emit...
- Dave
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