[LAU] No duplex mode with the EHCI driver and USB hub. Is the problem solved?

[Brendan Jones]

On 11/08/2011 06:22 PM, Brendan Jones wrote:
> On 11/07/2011 10:53 PM, Pablo Fernández wrote:
>> Hi!
>>
>> A few days ago in the alsa users mailing list, Clemens pointed to a
>> recent patch for the EHCI driver [1] [2] for solving the following
>> problem:
>>
>> The current TT scheduling doesn't allow to play and then record on a
>> full-speed device connected to a high speed hub.
>>
>
> I've had the same problem.
>
>  From what I've been able to gather from the LKML is that this occurred
> before the 3.2 staging merge.
>
> I'm looking forward to trying it out UA25EX / Asus N53SV (7 series) -
> would have done so already but my equipment is still in transit. Will
> let you know in a week or so when my container gets here.
>
> regards,
>
> Brendan
>

This patch has made it to the 3.3 kernel in Fedora and for some users 
this has fixed the error "cannot submit datapipe for urb 0, error -28: 
not enough bandwidth" on USB fullspeed devices like the UA25-EX.

regards,

Brendan