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authorTakashi Iwai <tiwai@suse.de>2009-08-27 18:45:07 +0400
committerTakashi Iwai <tiwai@suse.de>2009-08-27 19:42:08 +0400
commit36ce99c1dcab2978fc1900f19b431adedd8f99f6 (patch)
tree5023629848d50243df8bbb780fde50468fd6acd3 /Documentation/sound
parent1b0053a0f0893e6bbaaee0d28f5f6269459d8d14 (diff)
downloadlinux-36ce99c1dcab2978fc1900f19b431adedd8f99f6.tar.xz
ALSA: Add debug module option
Add debug module option to snd core. This controls the debug print level. When CONFIG_SND_DEBUG_VERBOSE is set, you can suppress the debug messages by giving or changing this parameter to a lower value. debug=0 means no debug messsages. As default, it's set to the verbose level 2. Since this option can be changed dynamically via sysfs file, you can suppress the verbose debug messages on the fly, which wasn't possible before. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 4252697a95d6..8e5b3488b370 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -60,6 +60,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
slots - Reserve the slot index for the given driver.
This option takes multiple strings.
See "Module Autoloading Support" section for details.
+ debug - Specifies the debug message level
+ (0 = disable debug prints, 1 = normal debug messages,
+ 2 = verbose debug messages)
+ This option appears only when CONFIG_SND_DEBUG=y.
+ This option can be dynamically changed via sysfs
+ /sys/modules/snd/parameters/debug file.
Module snd-pcm-oss
------------------