From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andoru Subject: Invalid PCM pointer with CMI8738 and pcm.c buffer underuns Date: Mon, 28 Apr 2014 21:28:42 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by alsa0.perex.cz (Postfix) with ESMTP id CC3CA260864 for ; Mon, 28 Apr 2014 23:28:56 +0200 (CEST) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Wet6e-000846-1c for alsa-devel@alsa-project.org; Mon, 28 Apr 2014 23:28:56 +0200 Received: from cl-86-125-141-31.cablelink.mures.rdsnet.ro ([86.125.141.31]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 28 Apr 2014 23:28:56 +0200 Received: from andoru.blah by cl-86-125-141-31.cablelink.mures.rdsnet.ro with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 28 Apr 2014 23:28:56 +0200 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: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org [Continued from here: http://thread.gmane.org/gmane.linux.alsa.devel/122028/focus=122354 ] > It's way too old. Better to build the latest kernel. The latest kernel available for my distro, or the latest kernel available "from Linus"? I've already tried the former. > You need to figure out the condition reproducing the issue. For all I know (I'm not that knowledgeable on those things, mind you) this happens completely at random. There hasn't been any pattern when the PC would become unusable, and the OS unresponsive. > For example, application may apply some strange buffer size and period > size the hardware chip doesn't like. If so, changing the buffer size > and/or period size may reduce the problem. I'm not aware of any feature to change the buffer size in any of the programs that cause the lock-ups. > Meanwhile, you can try the patch below, too, which aligns the period That patch is for kernel sources or for the above snapshots I mentioned? Or perhaps there are more recent ALSA source codes?