A few days ago in the alsa users mailing list, Clemens pointed to a
recent patch for the EHCI driver   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
. 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
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?
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