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-t…
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(a)dewdrop-world.net
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