Sound problems, Scsi CDDA ripping. 2.2+

Gregory Maxwell (linker@z.ml.org)
Thu, 18 Feb 1999 20:30:04 -0500 (EST)

I'm having a problem on three computers, where the computer refuses to
play sound. I suspect that the sound driver allocates the DMA every time
the audio device is opened inseted of when the driver is loaded, this is
not acceptiable with the current state of Linuxes VM.

On these systems, CDparanoia is used to read CDDA audio data from plextor
SCSI cdrom drives (on aic7xxx scsi controlers). Ocassionally audio is
played via /dev/dsp. This works fine for a while, but eventually the sound
driver starts reporting "Sound error: Couldn't allocate DMA buffer". Sound
is NOT autoloaded.

if you retry a number of times, it will eventually work, or if you dd
if=/dev/zero bs=bignumber of=/dev/null.

So it seems to me the issue would be solved by allocating the dma buffer
at module load then loading the modules at boot.

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