From owner-freebsd-current Fri Feb 9 3: 5: 3 2001 Delivered-To: freebsd-current@freebsd.org Received: from pike.osd.bsdi.com (pike.osd.bsdi.com [204.216.28.222]) by hub.freebsd.org (Postfix) with ESMTP id 9F8D137B401 for ; Fri, 9 Feb 2001 03:04:45 -0800 (PST) Received: from foo.osd.bsdi.com (root@foo.osd.bsdi.com [204.216.28.137]) by pike.osd.bsdi.com (8.11.1/8.9.3) with ESMTP id f19B4Px72952; Fri, 9 Feb 2001 03:04:25 -0800 (PST) (envelope-from jhb@foo.osd.bsdi.com) Received: (from jhb@localhost) by foo.osd.bsdi.com (8.11.1/8.11.1) id f19B3xj42543; Fri, 9 Feb 2001 03:03:59 -0800 (PST) (envelope-from jhb) Message-ID: X-Mailer: XFMail 1.4.0 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Fri, 09 Feb 2001 03:03:59 -0800 (PST) Organization: BSD, Inc. From: John Baldwin To: Mike Holling Subject: Re: problems with playback via pcm device Cc: current@FreeBSD.ORG, Ilya Naumov Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 09-Feb-01 Mike Holling wrote: >> i have Ensoniq ES1371-based soundcard supported by pcm driver and >> experience some problems. the sound played is interruped by clicks and >> distorsions, and they appear more often when the disk activity is high. >> during playback the kernel generates messages like 'pcm0: hwptr went >> backwards 64 -> 32'. any ideas? > > I have similar problems, except the disruptions only seem to occur during > keyboard activity. I ran a cvsup while using mpg123 and had no problems, > which is pretty impressive since the machine is a P133. However, even a > small amount of typing causes noticeable audio glitches. This happens > both with a ES1371 and an old SB16 ISA card. It seems I may also be > losing keystrokes from the keyboard, though I haven't confirmed it's not a > problem with the keyboard itself. This could be related to the entropy gathering by the random kthread. Have you tried removing the random device from your kernel? > - Mike -- John Baldwin -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.Baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message