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. 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?