[alsa-devel] Recent code changes for HD-audio on HG repo
tiwai at suse.de
Fri Aug 10 17:53:39 CEST 2007
right now I committed a series of patches for HD-audio driver to HG
repository. There are two big changes:
- The suspend/resume code is rewritten
Now the driver uses cached register values to restore the last
status. It's much cleaner than the previous code, and should work
better. But, I couldn't test it on all existing laptops.
So, please test and report any positive/negative feedbacks.
- New POWER_SAVE kconfig
The driver has POWER_SAVE confiugration. When enabled (it's so if
you build from alsa-driver tree), the driver turns off the codec and
the controller chips when not used, and turn on again dynamically on
demand. Good for laptops, good for mother earth! :)
The feature can be enabled/diabled even on the fly via "power_save"
module option of snd-hda-intel. For disabling it, write 0 to
/sys/modules/snd_hda_intel/parameters/power_save for disabling it,
or pass power_save=0 in modprobe option (or its configuration).
Again, please give any positive/negative feedbacks, as I couldn't test
More information about the Alsa-devel