Difficulty playing DVDs under AHCI/CAM?

Andriy Gapon avg at icyb.net.ua
Sat Aug 28 17:38:39 UTC 2010

on 28/08/2010 20:30 Garrett Wollman said the following:
> After a recent upgrade, I switched to AHCI/CAM for my SATA devices,
> including a new DVD drive.  Now I find that nothing can play DVDs any
> more.  For example, here's what mplayer does:


>   8469 initial thread CALL  close(0x4)
>   8469 initial thread RET   close 0
>   8469 initial thread CALL  read(0x3,0x7fffffffb4d0,0x800)
>   8469 initial thread RET   read -1 errno 6 Device not configured
> ...say what?  Why is the cd driver suddenly returning ENXIO?

Strange indeed.
Can you dtrace this read?  You can use combination of syscall and fbt providers
with execname predicate.

Andriy Gapon

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