There is a documented fix 1.11 from www.uglx.org where the
original driver was developed. This latest patch allows
APMD to start/stop the machine w/out requireing a restart
of the mixer. The patch provided by the author does not
seem to work with the 6.1 distro.
The sony-patch-2.2.13 that's there should apply fine (it
Should be fixed in 2.2.14-1.5.0 (in rawhide now.)