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Diffstat (limited to 'Documentation/sound/alsa/ALSA-Configuration.txt')
| -rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index f71ed680d33..2bdabe23bc7 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -768,6 +768,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. single_cmd - Use single immediate commands to communicate with codecs (for debugging only) enable_msi - Enable Message Signaled Interrupt (MSI) (default = off) + power_save - Automatic power-saving timtout (in second, 0 = + disable, default = 10) + power_save_controller - Reset HD-audio controller in power-saving mode + (default = on) This module supports one card and autoprobe. @@ -993,6 +997,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel ML (see the section "Links and Addresses"). + When CONFIG_SND_HDA_POWER_SAVE is set, two options, power_save and + power_save_controller become available. power_save specifies the + time to turn off the power automatically at idle status. When + power_save_controller is true, the controller is also turned off. + This might result in more obvious click noise at turning on/off. + Note 2: If you get click noises on output, try the module option position_fix=1 or 2. position_fix=1 will use the SD_LPIB register value without FIFO size correction as the current |