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| -rw-r--r-- | Documentation/sound/alsa/HD-Audio.txt | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt index ca8187de52d..ee9117eee1a 100644 --- a/Documentation/sound/alsa/HD-Audio.txt +++ b/Documentation/sound/alsa/HD-Audio.txt @@ -266,7 +266,7 @@ submit the improvement patch to the author. Direct Debugging ~~~~~~~~~~~~~~~~ If no model option gives you a better result, and you are a touch guy -to fight again the evil, try debugging via hitting the raw HD-audio +to fight against evil, try debugging via hitting the raw HD-audio codec verbs to the device. Some tools are available: hda-emu and hda-analyzer. The detailed description is found in the sections below. You'd need to enable hwdep for using these tools. See "Kernel @@ -389,7 +389,7 @@ power-down/up depending on the device. Some of them might be solvable, but some are hard, I'm afraid. Some distros such as openSUSE enables the power-saving feature automatically when the power cable is unplugged. Thus, if you hear noises, suspect first the -power-saving. See /sys/modules/snd_hda_intel/parameters/power_save to +power-saving. See /sys/module/snd_hda_intel/parameters/power_save to check the current value. If it's non-zero, the feature is turned on. @@ -503,6 +503,19 @@ alsa-project.org: - http://git.alsa-project.org/?p=alsa.git;a=tree;f=hda-analyzer +Codecgraph +~~~~~~~~~~ +Codecgraph is a utility program to generate a graph and visualizes the +codec-node connection of a codec chip. It's especially useful when +you analyze or debug a codec without a proper datasheet. The program +parses the given codec proc file and converts to SVG via graphiz +program. + +The tarball and GIT trees are found in the web page at: + +- http://helllabs.org/codecgraph/ + + hda-emu ~~~~~~~ hda-emu is an HD-audio emulator. The main purpose of this program is |