+==========================
Notes on Power-Saving Mode
==========================
AC97 and HD-audio drivers have the automatic power-saving mode.
-This feature is enabled via Kconfig CONFIG_SND_AC97_POWER_SAVE
-and CONFIG_SND_HDA_POWER_SAVE options, respectively.
+This feature is enabled via Kconfig ``CONFIG_SND_AC97_POWER_SAVE``
+and ``CONFIG_SND_HDA_POWER_SAVE`` options, respectively.
With the automatic power-saving, the driver turns off the codec power
appropriately when no operation is required. When no applications use
done fully or partially. It'll save a certain power consumption, thus
good for laptops (even for desktops).
-The time-out for automatic power-off can be specified via power_save
+The time-out for automatic power-off can be specified via ``power_save``
module option of snd-ac97-codec and snd-hda-intel modules. Specify
the time-out value in seconds. 0 means to disable the automatic
power-saving. The default value of timeout is given via
-CONFIG_SND_AC97_POWER_SAVE_DEFAULT and
-CONFIG_SND_HDA_POWER_SAVE_DEFAULT Kconfig options. Setting this to 1
+``CONFIG_SND_AC97_POWER_SAVE_DEFAULT`` and
+``CONFIG_SND_HDA_POWER_SAVE_DEFAULT`` Kconfig options. Setting this to 1
(the minimum value) isn't recommended because many applications try to
reopen the device frequently. 10 would be a good choice for normal
operations.
-The power_save option is exported as writable. This means you can
+The ``power_save`` option is exported as writable. This means you can
adjust the value via sysfs on the fly. For example, to turn on the
automatic power-save mode with 10 seconds, write to
-/sys/modules/snd_ac97_codec/parameters/power_save (usually as root):
+``/sys/modules/snd_ac97_codec/parameters/power_save`` (usually as root):
+::
# echo 10 > /sys/modules/snd_ac97_codec/parameters/power_save