On 01/26/2015 07:28 AM, Guido Aulisi wrote:
I will ASAP, now I'm not at home. IMHO I think this is something about usb than the mixer, because I didn't use it, I only noticed the xruns even without playing audio. I didn't try 3.18, because it isn't shipped with fedora yet.
Ciao
2015-01-26 14:04 GMT+01:00 Takashi Iwai tiwai@suse.de:
At Sun, 25 Jan 2015 12:42:22 +0100, Guido Aulisi wrote:
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.
Guido, Takashi,
I tried to reproduce this and failed on my Scarlett 18i8 (I don't have any other hardware).
I've just tested Ubuntu's 3.18.2 and daily mainline 3.19-r5 as follows: 1) Setup Scarlett 18i8 w/ jack (RT, 1024 frames/period, sample rate 48k, periods/buffer 2). 2) Launch Ardour3 and create/arm 8 tracks 3) Hit record
Using this I was unable to see any XRuns even when using Scarlett's mixer with alsamixer in the background on 3.19.
Let me know more details. Thanks, --chris j arges
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
Looks like a regression in the recent rework for Scarlett devices. Chris, do you have any clue?
In anyway, Guido, could you give lsusb -v output (for the relevant part)?
thanks,
Takashi