On Tuesday 19 September 2006 03:36, Clemens Ladisch wrote: > Pablo Yaggi wrote: > > I'm working in a multi-capture application with alsa and i discovered > > if i attach two "c-media usb headphone set" adapters to an usb hub which > > is attached to my computer when i try to read from the two devices the > > first one read (also open) errors with (-77) bad file descriptor status > > and the other one keep working. When i attach the two devices directly to > > the usb connectors (without hub) all works fine, the two devices can be > > read at the same time. > > What kernel version are you using? > > The EHCI transaction translator code (which is responsible for moving > audio data through an high speed hub) got a bugfix in 2.6.17, but still > artificially limits the bandwidth. It will be rewritten in 2.6.18. > > > HTH > Clemens > I tested it on 2.6.15, 2.6.16 and 2.6.17, so you think the problem is EHCI ? is there anyway to check it ? is it yet in rewriting process ? Thank's Pablo ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
