/etc/oss4/conf/oss_hdaudio.conf is in oss4-base 4.2-build2007-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # Open Sound System configuration file
# Remove the '#' in front of the option(s) you like to set.
#
#
# hdaudio_snopy is reserved for diagnostic purposes and it must be 0
# in all situations. Other values may make the driver vulnerable to
# DoS attacks. For security reasons only root can use this diagnostic
# interface.
#
#hdaudio_snoopy=0
#
#
# Setting hdaudio_jacksense=1 enables jack sensing mode when the
# hdaudio driver is loaded. In this mode all I/O pin's that are not
# in use will be disabled as well as the mixer controls that are related
# with them. In this way the mixer/control panel will become more intuitive.
# However OSS will need to be restarted with soundoff;soundon every time
# new inputs or outputs are attached to the audio jacks.
#
# NOTE! hdaudio_jacksense=1 works only in some systems. Many laptops and
# motherboards don't support jack sensing.
#
#hdaudio_jacksense=0
#
#
# Disable checks to skip unconnected jack. Values: 0-7, where value is a
# bitmask - every bit disables another check. Can override hdaudio_jacksense.
#
#hdaudio_noskip=0
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