At Tue, 19 Jun 2012 09:39:35 +0800, James Harkins wrote: > > At Mon, 18 Jun 2012 18:02:44 +0200, > Pablo Fernandez wrote: > > I think this is related to the EHCI driver in your kernel version. Try > > with a more recent kernel, for example, the stock kernel in ubuntu > > 12.04. Read Clemens to understand the problem. Here: > > > > http://old.nabble.com/No-duplex-mode-with-the-EHCI-driver-and-USB-hub.-Is-the-problem-solved--td32799593.html > > Looks promising. I've hesitated to upgrade to 12.04 because of some reports of USB audio devices not being recognized :-O Closing the loop on this -- I finally* checked out 12.04, and indeed, now I can get 2-in, 4-out with my FastTrack. Unfortunately, I get occasional xruns with this configuration (even with lowlatency + rtirq), but (at least with light use) I don't hear audible dropouts. 2-in, 2-out works without xruns. So I'll test it some more, beat it up with some CPU-intensive SuperCollider code, but I at least wanted to confirm that this analysis -- the kernel bug in 10.04 -- seems to have been spot on. Thanks a million! I never would have found that by myself -- James * "Finally" = While the semester was still in session (the academic calendar is a bit different in China, with the spring semester ending early in July), I didn't dare do anything invasive to my system :) Now I'm on summer break, perfect time. -- James Harkins /// dewdrop world jamshark70@xxxxxxxxxxxxxxxxx http://www.dewdrop-world.net "Come said the Muse, Sing me a song no poet has yet chanted, Sing me the universal." -- Whitman blog: http://www.dewdrop-world.net/words audio clips: http://www.dewdrop-world.net/audio more audio: http://soundcloud.com/dewdrop_world/tracks _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
