From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guido Aulisi Subject: Re: Regression in kernel 3.19-rc5 for usb2 scarlett 18i20 Date: Mon, 26 Jan 2015 14:28:14 +0100 Message-ID: References: <1422186142.4719.8.camel@yoda.heavyware> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ie0-f173.google.com (mail-ie0-f173.google.com [209.85.223.173]) by alsa0.perex.cz (Postfix) with ESMTP id A26D4260599 for ; Mon, 26 Jan 2015 14:28:15 +0100 (CET) Received: by mail-ie0-f173.google.com with SMTP id tr6so8506310ieb.4 for ; Mon, 26 Jan 2015 05:28:15 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Takashi Iwai Cc: alsa-devel@alsa-project.org, Chris J Arges List-Id: alsa-devel@alsa-project.org 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 : > 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. >> >> 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