Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 623b9f67 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Update HD-Audio.txt 



Fixed typos and added a section about codecgraph.
Thanks to Vedran Miletić and Daniel T Chen for suggestions.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d2afbe78

Documentation/sound/alsa/HD-Audio.txt

+15 −2
Original line number Diff line number Diff line
@@ -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