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USB issue
Not too shy to talk
Not too shy to talk


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Hi!

I got an issue with the USB stack when using a cheap USB-fan. As soon as I turn the fan on I get messages from the USB stack saying something about it failing to add the device and it continues till I turn the fan off.

This is what it looks like:

http://hd.se/multimedia/archive/00135/usb_flakt_jpg_135873d.jpg

It's connected to an USB 2.0 hub which is connected to an AmigaOne XE. I'm using AOS 4.1 update 2.

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Re: USB issue
Quite a regular
Quite a regular


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@hotrod

Quite possibly the fan doesn't talk to the USB data lines at all, but only uses the +5V supply lines. The USB controller knows something is plugged in and tells the USB stack that there is something there, but the USB stack can't cope with being ignored and complains.

I don't think there is anything you can do about it except use another machine to plug it into. Have you tried using an externally powered hub? It might work without the need for a computer.

cheers
tony
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Re: USB issue
Not too shy to talk
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@tonyw

So why is it ignored on other systems?

Yes I can use batteries so that's a solution and it's ok for now :)

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Re: USB issue
Not too shy to talk
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@hotrod

apparently other systems' usb stacks are configured to complain only once, while OS4's complains for as long as the conceived problems continue.

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Re: USB issue
Not too shy to talk
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@Vulture

I hope that this will change in the future. There are lots of USB hardware that only uses the power from the USB ports and it would be pretty bad if none of them worked with AOS 4.x.

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Re: USB issue
Just popping in
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@all

A little off-topic, but, is it right to use the USB ports directly from the PC to power such things as fans, lights and the likes? Could that damage the USB ports? Maybe better to use a powered hub for those things?

PowerBook 5.2 MorphOS 3.15
PowerBook 5.8 MorphOS 3.17
Amiga 1200 BPPC/BVision AOS4.1 FE
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Re: USB issue
Home away from home
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@hotrod Quote:
There are lots of USB hardware that only uses the power from the USB ports

And there are some 'hybrid' devices which connect using one USB port, but (only) gain extra power using a second USB port. OS4 wouldn't work with those devices either, I imagine.

Although IIRC I did plug one into my Sam440 once, I think it worked! But maybe because it didn't draw enough power to need the second USB port.

Author of the PortablE programming language.
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