On 15/09/2020 10:16, js wrote:

> I had similar problems. At some point in booting the pi powers up the
> usb devices and it didn't seem to like the hub being already powered at
> that point.
> I made a usb lead with just the power lines connected. This was
> connected to a spare usb socket on the Pi and was used to power a relay.
> The relay switched on when the Pi powered up the usb lines and power to
> the hub was routed through the relay contacts so that it powered up at
> the same time. This worked OK.
> The relay must be able to work on 5 volts and the one I used pulled
> about 30mA.
> I didn't try it but perhaps a logic level mosfet could replace the relay?

Should have mentioned that I had cut the red wire in the hub usb lead so
that it could not backfeed the Pi.

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