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author | Takashi Iwai <tiwai@suse.de> | 2006-01-12 18:28:44 +0100 |
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committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 10:22:51 +0100 |
commit | 27346166a9b3b9eee586bce212502cddf9685a07 (patch) | |
tree | 97a1feb7937b0ca82538e049e7e332f4797b2eb9 /Documentation/sound | |
parent | 84a43bd523a63f1b53fd734c3798d71b7b53f123 (diff) | |
download | linux-27346166a9b3b9eee586bce212502cddf9685a07.tar.bz2 |
[ALSA] hda-intel - Add single_cmd option for debugging
Modules: Documentation,HDA Intel driver
Added single_cmd module option for debugging in the case CORB/RIRB
doesn't work well (e.g. due to wrong irq routings).
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
-rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 36b511c7cade..cc8a70187199 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -671,6 +671,8 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. model - force the model name position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size) + single_cmd - Use single immediate commands to communicate with + codecs (for debugging only) This module supports one card and autoprobe. @@ -723,6 +725,17 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. (Usually SD_LPLIB register is more accurate than the position buffer.) + NB: If you get many "azx_get_response timeout" messages at + loading, it's likely a problem of interrupts (e.g. ACPI irq + routing). Try to boot with options like "pci=noacpi". Also, you + can try "single_cmd=1" module option. This will switch the + communication method between HDA controller and codecs to the + single immediate commands instead of CORB/RIRB. Basically, the + single command mode is provided only for BIOS, and you won't get + unsolicited events, too. But, at least, this works independently + from the irq. Remember this is a last resort, and should be + avoided as much as possible... + The power-management is supported. Module snd-hdsp |