[alsa-devel] Regression in kernel 3.19-rc5 for usb2 scarlett 18i20

Hi, I noticed a regression in 3.19-rc5 kernel (as shipped by fedora rawhide) with usb2 focusrite scarlett 18i20. I get a lot of xruns with jack, even at 1024 frame buffer and 2 periods. In 3.17.8 it works quite well without xruns at the same settings.

I use a fedora 20 (64bit) laptop with 8GB ram, I only installed the rawhide kernel to try the new included scarlett mixer, no other software components changed.

I can try to do some other test, but compiling the kernel on this laptop is time consuming.

Thanks Guido