On Wednesday 31 October 2012 16:49:36 Ganesh Kumar wrote:
> Hi all,
>
> *** Sorry if this is not the right forum to post this issue, as i
> searched for any linux usb users mailing list, dint get one, the one
> on sourceforge seems obsolete, so tried posting here. ***
>
> I'm working on Sierra wireless 3g usb dongle on Linux 2.6.38 on my
> embedded board, I'm facing an issue w.r.t usb when I connect the 3g
> dongle through a 7 port Dlink USB Hub.
>
> 1. below setup doesn't work
> board <--> dlink hub <---> 3g usb dongle
> I connect the 3g usb dongle to the Dlink USB Hub and i issue the AT
> commands through the busybox microcom, after I get OK for the
> connection, if I try to
> run dhclinet on wwan0 or if I do a ifconfig wwan0 up i see the below
> error message:
>
> SIOCSIFFLAGS: No space left on device
-ENOSPC indicates that bandwidth was insufficient.
> 2. below setup works just fine:
> board <---> 3g usb dongle
> if i connect the 3g usb dongle directly to the embedded board's usb
> port & try the steps as per (1)
> it works smoothly !!
>
> is it something to do with the linux usb stack? any clue will really
> help in resolving the issue
> Has anyone faced this issue before?
> Thanks in advance for your time!.
Do you have anything else on that hub that eats bandwidth?
Regards
Oliver
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