linuxaudio.org

Folderol wrote:

quoted text
> On Mon, 22 Sep 2008 13:07:07 +0930

> Matthew Smith  wrote:

>

>> Quoth Matthew Smith at 2008-09-22 11:07...

>>> ALSA is not getting inbound data from the device although it can send

>>> OK.  The keyboard works as it should under Windows, so I can only guess

>>> that there is something wrong with ALSA - either a mis-configuration or

>>> a bug - but I don't even know where to start looking.

>> Want to know what was stopping it working?  Do you?

>>

>> USB hub.  Yep, a nasty little bit of  hardware.

>>

>> The keyboard was connected through a USB hub.  When I traced through the

>> wiring, found this and plugged directly into the computer, it all

>> started working.

>>

>> Any USB gurus like to tell us why that was?

>>

>> Cheers

>>

>> M

>

> At a guess - some USB hubs only work at USB 1 (or so I've read)

Also, some USB hubs may not provide the full spec of power to every port

on the hub if you happen to be using all of them. I'm using 5 of the 6

available ports on my little powered Zonet USB2 hub (with transfer rate

to prove it!) but if I add my 2.5" external notebook hard drive to the

last available port, the drive doesn't get enough juice to power up and

make a connection. Directly connected to the computer, it works fine.
If it's really a USB1 hub, it may not be providing enough power for

everything connected to the hub when you plugged your keyboard into?
--

David

gnome@hawaii.rr.com

authenticity, honesty, community

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