Re: Sound error: Couldn't allocate DMA buffer
Q (Q@ping.be)
Wed, 30 Jun 1999 20:22:31 +0200
Constantine Gavrilov wrote:
>
> Y should be a FAQ by now...
> >From the kernel 2.2.x sound documentation:
> -----------------------------------------------------------------------------
> Persistent DMA Buffers:
>
> The sound modules normally allocate DMA buffers during open() and
> deallocate them during close(). Linux can often have problems
> allocating
> DMA buffers for ISA cards on machines with more than 16MB RAM. This is
> because ISA DMA buffers must exist below the 16MB boundry and it is
> quite
> possible that we can't find a large enough free block in this region
> after
> the machine has been running for any amount of time. The way to avoid
> this
> problem is to allocate the DMA buffers during module load and
> deallocate
> them when the module is unloaded. For this to be effective we need to
> load
> the sound modules right after the kernel boots, either manually or by
> an
> init script, and keep them around until we shut down. This is a little
> wasteful of RAM, but it guarantees that sound always works.
I have it build in the kernel, and I got the same problem... Can I do
something simular?
Q
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