From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0000583]: xruns when playing audio or video files Date: Fri, 15 Oct 2004 19:12:44 +0200 (CEST) Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <20041015171244.ACED83B007@server.perex-int.cz> Content-Type: text/plain; charset=iso-8859-1 Return-path: Received: from mail.perex.cz (gate.perex.cz [82.113.61.162]) by alsa.alsa-project.org (ALSA's E-mail Delivery System) with ESMTP id 13C921B6 for ; Fri, 15 Oct 2004 19:12:45 +0200 (MEST) Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A BUGNOTE has been added to this bug. ====================================================================== https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000583 ====================================================================== Reported By: KAtiOS Assigned To: tiwai ====================================================================== Project: ALSA - driver Bug ID: 583 Category: PCI - atiixp Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: Gentoo Linux Kernel Version: 2.6.9_rc4 ====================================================================== Date Submitted: 10-15-2004 16:27 CEST Last Modified: 10-15-2004 19:12 CEST ====================================================================== Summary: xruns when playing audio or video files Description: I get xruns when playing files. I tested with lots of 2.6 kernels, up to 2.6.9_rc4 with the same results. It seems that mplayer with sdl output works fine, but xruns with alsa. Using acpi=off or pci=noacpi helps in mplayer but not in vdr (with softdevice plugin - using alsa). ====================================================================== ---------------------------------------------------------------------- lee - 10-15-2004 18:43 CEST ---------------------------------------------------------------------- This is a kernel issue, not an ALSA bug. If you want xrun-free operation you HAVE to use a kernel patched for low latency. Please close this bug. ---------------------------------------------------------------------- KAtiOS - 10-15-2004 18:51 CEST ---------------------------------------------------------------------- Since when a low latency [so.. patched] kernel is needed to listen to music and play video correctly? Given that the processor isn't particulary weak and that's the only task of the system, it shouldn't be hard to keep pace. ---------------------------------------------------------------------- lee - 10-15-2004 19:02 CEST ---------------------------------------------------------------------- OK, you are right, you should not need to patch the kernel to avoid massive xruns with regular AV playback. The reason I say it's a kernel issue is that disabling ACPI seems to fix the problem. Do you get fewer xruns if you disable xrun debugging? This can cause a cascade effect where a single xrun triggers hundreds of them due to printk overhrad. Also, does it work OK with a 2.4 kernel? ---------------------------------------------------------------------- KAtiOS - 10-15-2004 19:12 CEST ---------------------------------------------------------------------- Disabling ACPI seems to help with mplayer, but mplayer causes troubles only a few times in the duration of a music, whereas VDR got several xruns a second, whether ACPI is disabled or not. I tried with xrun debugging desactived but VDR acts the same (visibly at least). I haven't used a 2.4 in months, would it helped it I tried with one? Bug History Date Modified Username Field Change ====================================================================== 10-15-04 16:27 KAtiOS New Bug 10-15-04 16:27 KAtiOS Distribution => Gentoo Linux 10-15-04 16:27 KAtiOS Kernel Version => 2.6.9_rc4 10-15-04 18:43 lee Bugnote Added: 0002168 10-15-04 18:51 KAtiOS Bugnote Added: 0002169 10-15-04 19:02 lee Bugnote Added: 0002170 10-15-04 19:12 KAtiOS Bugnote Added: 0002171 ====================================================================== ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl