On Sun, 15 Apr 2012 17:50:25 +0100
Ken Moffat <[email protected]> wrote:

> i.e. it (slowly: the file is on a local disk) fills the
> buffer, plays the buffer, then waits while it refills the
> buffer.

I doubt this is the problem, especially on a new machine,
but in the past issues like this were a symptom that DMA
mode was not enabled for the drive(s) in question. Are
you sure the kernel is enabling DMA I/O for the DVD and
the HD?

BTW, is there a way to check for a drive's DMA mode in
/proc on the newer (/dev/sda using) kernels? (In the old
days it was in /proc/ide, but all that is routed through
the scsi i/o system today.)



  Cheers,

  Mike Shell
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