From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 27 Sep 2001 18:32:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 27 Sep 2001 18:32:22 -0400 Received: from [212.37.20.41] ([212.37.20.41]:7180 "HELO zaphod.nu") by vger.kernel.org with SMTP id ; Thu, 27 Sep 2001 18:32:10 -0400 From: =?us-ascii?Q?Peter_Sandstrom?= To: "Christian Ohm" Cc: Subject: RE: sound slowdown when accessing ide cdrom Date: Sat, 29 Sep 2001 00:30:52 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <20010928000707.A30994@thevoid.net> X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Importance: Normal Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I've been getting this in both win2k and linux using several different cdrom drives on an abit kt7a-raid (via kt133a) and a soundblaster awe64 isa card. Looks like the kt133 puts ide performance over isa? I didn't have this feature on my abit bp6 (intel 440bx). /Peter -----Original Message----- From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Christian Ohm Sent: den 28 september 2001 00:07 To: linux-kernel@vger.kernel.org Subject: sound slowdown when accessing ide cdrom hi. i'm using an old ide cdrom drive and a soundblaster awe64 isa pnp sound card (using the alsa-driver). when i'm accessing the cdrom, the sound playback slows down. a little and irregularly when copying files, more and almost constant (about 10%) when grabbing audio using cdparanoia. it works perfect when using the scsi cdrom drive. i'm using an nmc 8tax+ (via kt133) mainboard with duron700 and 512mb ram, one isa slot with the soundblaster awe64 pnp, a dawicontrol dc2975u scsi controller (symbios logic 53c875), a matrox g400, a sis900 ethernet controller. the ide cdrom drive is an old 4x speed drive (/proc/ide/ide1/hdc/model says 'MATSHITA CR-581') connected to the second ide port (without slave). i'm using kernel 2.4.9 and the oss emulation of alsa (debian unstable packages 0.9+0beta7-1). i also tested this with the low latency patch (which didn't change anything). anyone knows what happens there? it seems like there's some strange interaction of the ide cdrom driver and a timer used by (at least) alsa. if there's some info missing i'd be happy to provide it. bye christian ohm ps: since i'm not subscribed to this list, please cc all replies to me (chr.ohm@gmx.net). thanks. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/