[Arm-netbook] Announcing Fedora 19 ARM remix for Allwinner SOCs release 1, now with A20 support (fwd)

[Roman Mamedov]

On Fri, 19 Jul 2013 15:30:53 +0200
Antony Antony <antony at phenome.org> wrote:

> USB controller caveats
> ----------------------
> The OTG USB controller in host mode only supports a limited number of
> devices, plugging in a hub + mouse + keyboard typically will make either
> the mouse or keyboard not work. This is a hardware limitation which we
> will likely not be able to work around.
> 
> On tv-sticks and top-set boxes, simply avoid the otg connector, instead
> use a hub in a regular host usb connector. Note on the mini-x the otg / host
> marking is not always correct. If things don't work try using the OTG
> connector instead!
> 
> On tablets and the gooseberry unfortunately only the otg connector is
> available. One solution there is using a single usb-device which is
> both a keyboard and a mouse at the same time. IE the receiver for logitech
> wireless desktop sets.

Oh turns out that's what I was fighting with yesterday...

On an old MK802 512 MB,

- an USB 2.0 'uvcvideo' webcam doesn't work at all in the OTG port;

- an USB HDD works, but with speeds 2x less than in the normal port (14 MB/sec
  instead of 30 MB/sec).

-- 
With respect,
Roman
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