Date: Tue, 28 Jan 1997 23:49:39 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: Mark Taylor <mtaylor@cybernet.com> Cc: multimedia@freebsd.org Subject: Re: SoundBlaster Pro 2 card stops for video output Message-ID: <Pine.BSI.3.94.970128234800.24983z-100000@localhost> In-Reply-To: <XFMail.970128182337.mtaylor@cybernet.com>
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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
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