<div dir="ltr">Similarly I have an ebook reader that will only charge when plugged into a USB2.0 port, but not a USB3.0 port or just a normal power supply. I'm afraid that to me, that is just a dumb restriction!<div><br></div><div>So yes, despite the fact that USB3 is meant to be backwards compatible, some manufacturers have successfully avoided this technical achievement.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 8, 2016 at 10:24 AM, Dan Wallis <span dir="ltr"><<a href="mailto:mrdanwallis@gmail.com" target="_blank">mrdanwallis@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">My wife bought an MP3 player from The Warehouse about a year ago, and<br>
our laptop doesn't recognise that there's anything plugged in when<br>
it's attached to the USB3 ports, but works just fine on the USB2 port.<br>
The cable is fine, since it's a regular micro-USB which we use happily<br>
for other devices on the USB3 ports without issue, and the same cable<br>
works with USB2 and this device. Maybe there's something in the device<br>
which refuses to talk anything newer than USB2. I'd link to it, but<br>
looks like they're not selling anymore.<br>
<div class="HOEnZb"><div class="h5"><br>
2016-12-08 8:44 GMT+13:00 Volker Kuhlmann <<a href="mailto:list0570@paradise.net.nz">list0570@paradise.net.nz</a>>:<br>
> On Thu 08 Dec 2016 08:16:11 NZDT +1300, Charles Manning wrote:<br>
><br>
>> "If you are using a computer with USB3 ports, it’s suggested that you<br>
>> attach a USB2-compliant hub and connect your CHIP to the hub, instead of<br>
>> directly to the USB3 port."<br>
><br>
> Pretty p.-poor, isn't it?<br>
><br>
> If I had to guess the reason, I'd say it's because of reliability. Many<br>
> USB2 connectors (both plugs and sockets) are very pooly manufactured<br>
> with some insane tolerances, I can easily get unreliable connections by<br>
> wriggling a cable, that's a USB2 cable from CDL and a computer<br>
> case/maninboard bought in Christchurch so not even Aliexpress.<br>
> With USB3 sockets things get worse, because the contact area for the<br>
> USB2 plug in the 3 socket is much reduced.<br>
><br>
> So presumably the devkit supplier doesn't want to cop the flac for the<br>
> PC industries' crappy hardware and is suggesting a way to make it<br>
> more(?) reliable. Whether a hub is indeed more reliable...<br>
><br>
> Volker<br>
><br>
> --<br>
> Volker Kuhlmann<br>
> <a href="http://volker.top.geek.nz/" rel="noreferrer" target="_blank">http://volker.top.geek.nz/</a> Please do not CC list postings to me.<br>
><br>
><br>
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