From owner-freebsd-multimedia Tue Jan 28 23:49:45 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id XAA16585 for multimedia-outgoing; Tue, 28 Jan 1997 23:49:45 -0800 (PST) Received: from gdi.uoregon.edu (gdi.uoregon.edu [128.223.170.30]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id XAA16580 for ; Tue, 28 Jan 1997 23:49:43 -0800 (PST) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.4/8.6.12) with SMTP id XAA03448; Tue, 28 Jan 1997 23:49:39 -0800 (PST) Date: Tue, 28 Jan 1997 23:49:39 -0800 (PST) From: Doug White X-Sender: dwhite@localhost Reply-To: Doug White To: Mark Taylor cc: multimedia@freebsd.org Subject: Re: SoundBlaster Pro 2 card stops for video output In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-multimedia@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Tue, 28 Jan 1997, Mark Taylor wrote: > I have a Pentium 166 MHz system w/ FreeBSD-2.2-ALPHA and a SoundBlaster Pro 2 > (CT 1600) sound card. > > The sound is fine unless I have another window scrolling text (as in > "while [ 1 ]; do ps -ax; done"). At that time, the sound seems to > stop playing (the sound process starves?). I can't reproduce this on my P100, GUS PnP, and ATI Mach64 video using your command (under X -- the ps -ax is barely doing anything!) What's your video card? > I've tried the sound card at IRQ 5 and 7 (always DMA channel 1), with > and w/o the 'shared DMA channel' set on the card. Nothing else is > using the IRQ or DMA channel that the sound card is on. I've been > setting the LPT device to the other IRQ [5 or 7]. I've also tried > setting "options SBC_IRQ=5" in the kernel config file (and rebuilding/ > installing it). DMA 1 may be used by something else; also, the shared DMA may be confusing it. (Wait -- a Pro isn't a 16 bit device, it only has one DMA channel!) > I have DMA channel 1 and IRQ channels 5 and 7 set for "Legacy ISA" in the BIOS > config (yes, there are four PCI devices in there: de0, video, PCI IDE, > and USB port), so nothing should be stealing the IRQ or DMA channel. How about other ISA devices? Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major