Just a thought -- are your hubs powered? I wonder if bus power is being
overextended. Is there any information in dmesg?
On Thu, Aug 11, 2011 at 3:10 PM, Steinar Midtskogen
<[email protected]>wrote:
> Paul Alfille <[email protected]> writes:
>
> > I just tried 7 DS9490R adapters (all I had at hand). Worked well.
> ...
> > I believe that the only limit of adapters is libusb and the USB
> protocol.
> > owserver puts all the adapters in linked list of effectively unlimited
> size.
>
> I've now tried a setup with 15 adapters (will become 18 when I'm
> done). At first I wasn't able to get owserver to see more than 8-9
> adapters at a time. If I added more than that, either it didn't
> appear, or it appeared but another adapter disappeared. But all
> devices showed up in the system log.
>
> I was using two 10 port USB hubs, one connected to the other. Then I
> tried to connect both hubs directly to the computer, i.e. flattening
> the USB bus hierarchy, and this made owserver see everything.
>
> Do you think this is an owserver issue or a usblib issue?
>
> I've never seen anything bigger than a 10 port USB hub and I only have
> two USB ports available on the computer, so I fear I will be limited
> to 20 devices (which will suffice for now). I'm not sure what happens
> if I connect the two 10 port hubs to another hub. That way I'll
> increase the depth, but all adapters will still be on the same level.
>
> # owget -s 3000
> /81.430B30000000
> /28.E2E9A2000000
> /28.8AE1EB010000
> /81.752730000000
> /28.9A457E010000
> /26.8E735A000000
> /81.084C30000000
> /26.162A15000000
> /81.FA4B30000000
> /10.A7A94D000800
> /81.5F2230000000
> /1D.4C4805000000
> /26.0AF3F1000000
> /81.804530000000
> /81.834530000000
> /1D.36F909000000
> /10.D5AD0F010800
> /81.A32530000000
> /20.AF1E01000000
> /10.7E2A14000800
> /81.244C30000000
> /28.5F4BEC010000
> /1D.639801000000
> /81.9F4530000000
> /1D.E42100000000
> /20.E0C700000000
> /10.7F1914000800
> /26.22FB4F000000
> /10.519AC8000800
> /81.1D4C30000000
> /12.379353000000
> /28.A03F7E010000
> /10.53F652010800
> /1D.0A5201000000
> /28.C2437E010000
> /81.9B2230000000
> /28.FA9831000000
> /81.324C30000000
> /28.56747E010000
> /28.856C31000000
> /28.B06E7E010000
> /28.6D6B31000000
> /28.7ED6EB010000
> /28.ED7715000000
> /81.901A30000000
> /28.1D437E010000
> /12.325E23000000
> /12.116123000000
> /26.396385000000
> /81.562B30000000
> /1D.9E220A000000
> /1D.311B09000000
> /bus.14
> /bus.13
> /bus.12
> /bus.11
> /bus.10
> /bus.9
> /bus.8
> /bus.7
> /bus.6
> /bus.5
> /bus.4
> /bus.3
> /bus.2
> /bus.1
> /bus.0
> /uncached
> /settings
> /system
> /statistics
> /structure
> /simultaneous
> /alarm
>
> --
> Steinar
>
>
>
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