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Date:      Sun, 10 Jun 2001 21:12:11 +0200
From:      Marian Cerny <cernm0bm@st.ms.mff.cuni.cz>
To:        freebsd-questions@FreeBSD.org
Subject:   ESS1869 sound card & UDMA problem
Message-ID:  <20010610211211.A29391@artax.karlin.mff.cuni.cz>

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Subtitle: My sound card doesn't like my harddisk (or vice versa?)

Dear FreeBSD users,

there is something wrong with my soundcard or my harddisk. When I play some sound (usualy using mpg123), it slashes/cracks(?) whenever my harddisk works. I think the problem is with DMA.

I compiled my own kernel. First I commented out lots of choices in the GENERAL one and it worked (the kernel). Then I added these lines to my kernel configuration:

device          pcm
device          sbc

as written in the FreeBSD handbook.

Ok, here are some lines from dmesg:

atapci0: <SiS 5591 ATA33 controller> port 0x4000-0x400f,0x374-0x377,0x170-0x177,
0x3f4-0x3f7,0x1f0-0x1f7 irq 14 at device 1.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0

sbc0: <ESS ES1869> at port 0x220-0x22f,0x388-0x38b,0x330-0x331 irq 5 drq 1,0 on
isa0
pcm0: <ESS 18xx DSP> on sbc0
ad0: 14649MB <IBM-DTLA-307015> [29765/16/63] at ata0-master UDMA33

I really have no idea where the problem is. But the same problem I had under Linux, when I turned on dma transfer (using hdparm). With Windows95 it worked but I don't know if the disk used UDMA.

Btw, the sound card is on motherboard.

-- 
Marian Cerny
cerny@spnv.sk

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