From owner-freebsd-questions@FreeBSD.ORG Fri Feb 22 16:17:31 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6EF3B16A409 for ; Fri, 22 Feb 2008 16:17:31 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from falcon.cybervisiontech.com (falcon.cybervisiontech.com [217.20.163.9]) by mx1.freebsd.org (Postfix) with ESMTP id 29FC613C44B for ; Fri, 22 Feb 2008 16:17:30 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from localhost (localhost [127.0.0.1]) by falcon.cybervisiontech.com (Postfix) with ESMTP id D805543FA1B; Fri, 22 Feb 2008 18:17:29 +0200 (EET) X-Virus-Scanned: Debian amavisd-new at falcon.cybervisiontech.com Received: from falcon.cybervisiontech.com ([127.0.0.1]) by localhost (falcon.cybervisiontech.com [127.0.0.1]) (amavisd-new, port 10027) with ESMTP id DPeE+GrE7wjn; Fri, 22 Feb 2008 18:17:29 +0200 (EET) Received: from [10.74.70.239] (unknown [193.138.145.53]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by falcon.cybervisiontech.com (Postfix) with ESMTP id 8C33E43F86B; Fri, 22 Feb 2008 18:17:28 +0200 (EET) Message-ID: <47BEF597.9070503@icyb.net.ua> Date: Fri, 22 Feb 2008 18:17:27 +0200 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.9 (X11/20071208) MIME-Version: 1.0 To: freebsd-questions@freebsd.org, multimedia-list freebsd Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Subject: sbc: isa plug-n-play X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Feb 2008 16:17:31 -0000 I have an older hardware system with a newer OS on it :-) It's i386 7.0-RC1 on 440BX / Pentium III. I have the following soundcard in ISA slot on the system: sbc0: at port 0x220-0x22f,0x330-0x331,0x388-0x38b irq 5 drq 1,5 pnpid CTL00b2 on isa0 sbc0: [GIANT-LOCKED] sbc0: [ITHREAD] pcm0: on sbc0 I believe that the soundcard supports ISA Plug-n-Play. Everything works great. But recently I had an itch to go trough BIOS settings. I spotted one named "Plug-n-Play OS" and it was set to disabled. I thought "what the heck" FreeBSD is a Plug-n-Play OS for a long time, so flipped it to enabled. After that no joy, the soundcard stopped to work. It was detected as before, there is no difference in dmesg whatsoever, but it did not generate any interrupts (verified with vmstat -i). And any playback attempt resulted in zero sound and the following message on console: pcm0:virtual:dsp0.vp0: play interrupt timeout, channel dead So I disabled the option again and everything is fine. Practical conclusion: don't do it. Question of curiosity: what is it that BIOS can do with this card that our driver can not ? -- Andriy Gapon