Thanks for the feedback.
I do not see anything in the lsusb command. In contrast, plugging the same
powered USB2.0 hub into my Linux laptop provides the following addition to
Bus 001 Device 012: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Additionally, after plugging or un-plugging, there are not any new entries
Forgive the naive question, but are there any modules or similar things that
I need to install or enable to make USB operate?
One last question, when connecting to the OTG port, do you use a mini-A
adapter cable (the one that grounds the ID pin... thereby enabling OTG/host
mode?). I did not own one of these cables, but have ordered one. We'll see
if I can get the OTG port to cooperate !
On Thu, Oct 27, 2011 at 3:57 AM, Alexander Thomas <
> Hi Nathan,
> I have used USB sound cards successfully with my Overo (through hubs
> or connected to the OTG port), but I only tried a stock 2.6.36 kernel
> and a custom 2.6.35 kernel.
> I checked the config for the kernel you're using and it does have USB
> audio built-in, so that can't be the problem. Does anything show up in
> the system logs when you plug in a USB device, or nothing at all? In
> the latter case it is probably a hardware issue.
> On Thu, Oct 27, 2011 at 6:45 AM, Nathan Young <youngn111@...> wrote:
> > Hi All.
> > I am new to the gumstix mail list. I am designing embedded HW for an
> > project, and am planning on using gumstix as part of the early production
> > hardware.
> > USB Host does not seem to be working on my board. I do not get any
> > at a terminal prompt when devices are plugged. Nor does 'lsusb' show
> > anything. Should it 'work' out of the box, or am I doing something
> > Here's the setup & background:
> > I purchased an Overo Earth + Tobi board last week from gumstix.com, and
> > found it had a build image dated from 2009. This seemed pretty stale, so
> > created an SD card with the latest build per the directions on the
> > site. http://cumulus.gumstix.org/images/angstrom/factory/
> > The build is dated 2011-08-30, and results in a kernel of 2.6.39.
> > After the OS was intalled, I began to port our software from our other
> > platform, and have been able to successfully get data to/from the Tobi
> > onboard audio input/outputs. Our application requires a second audio
> > To accomplish this, I am trying to connect a Behringer UCA202 USB Sound
> > to the Tobi board. When I plug the sound card into the USB Host port,
> > nothing happens. After reading these archives, I find this is not too
> > surprising as the port only communicates with 2.0 devices (and this sound
> > card is 1.1). So I tried a USB Flash drive, 2.0 unpowered hub, and 2.0
> > powered hub, as well as combinations of these devices. Still nothing.
> > Lsusb always returns this...
> > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> > Incidentally, I have tested the UCA202 on a Linux PC, and it works
> > perfectly.
> > I have read about the R26 on early Overo boards which kept the USB Host
> > working correctly. Given that my Overo Earth came with kernel build from
> > 2009, I am concerned that perhaps somehow my order was fulfilled with a
> > really old module that might still contain R26. Does anyone know where
> > find this resistor on the board? I studied the silkscreen pretty
> > but could not find R26.
> > I also turned up a few internet threads talking about the 2.6.39rc1 and
> > having polarity reversed on an (reset/enable?) line for the USB Host PHY.
> > It appeared from the threads that the problem was well understood and
> > be fixed in the 2.6.39 release. Has anyone confirmed USB Host operation
> > with the 2011-08-30 pre-canned build from Gumstix website?
> > Last, it seems that in general, users have more success interfacing with
> > OTG port. I understand that a special cable is needed with ground
> > on the ID pin to activate host mode on the Overo/Tobi. Gumstix sells a
> > cable, but it terminates to Mini connectors, which are not the typical
> > interface of a Standard A connector. If anyone is using a hub on the OTG
> > port, could you describe your setup, please? Did you have to use
> > cables to interwork the different connector styles and genders from the
> > to the Tobi?
> > Any other ideas to check?
> > Thanks much!
> > Regards,
> > Nate
> Alexander Thomas
> Research Engineer
> eSATURNUS NV
> T +32 16 40 12 82
> M +32 477 51 63 62