linuxaudio.org

> A few days ago in the alsa users mailing list, Clemens pointed to a

quoted text
> 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.

>

> In connection with this, there was a discussion here some months ago

> [3]. Some users said that they were not able to get jack working in

> duplex mode . I also tried to prepare my sister's notebook with a UA25EX

> and duplex did not work either. I encountered the same problem in the

> laptop of a friend of mine. In both cases, the computers have an Intel 5

> Series/3400 Series Chipset USB2 controller.  Jack always says "broken

> pipe".

>

> I have not tried the patch yet but it seems to work if you read the

> whole thread in alsa-users. Has someone else tried? Joan? Jeremy?

Hi Pablo,
Apparently, it works!

I have the exact same USB port 'Intel Corporation 5 Series/3400 Series

Chipset USB2 Enhanced Host Controller (rev 05)'
and I never managed to run the UA-25Ex in full duplex until...today

for the first time!

(please note that I was using this patch as well

https://gist.github.com/1168715 for another

USB soundcard, but I believe now this is not what fixed the problem).
Aurélien

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