22 Sep
2008
22 Sep
'08
7:52 a.m.
Folderol wrote:
On Mon, 22 Sep 2008 13:07:07 +0930
Matthew Smith <matt(a)smiffytech.com> wrote:
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(a)hawaii.rr.com
authenticity, honesty, community
Quoth Matthew Smith at 2008-09-22 11:07...
At a guess - some USB hubs only work at USB 1 (or so I've read) 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 $10 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