Commit:     959047431a9e65f6ae25705e77a8e460a1aa04c0
Parent:     2bac647c45ed9b397ace9109e6935c1364690f8a
Author:     Takashi Iwai <[EMAIL PROTECTED]>
AuthorDate: Sat May 19 17:06:42 2007 +0200
Committer:  Jaroslav Kysela <[EMAIL PROTECTED]>
CommitDate: Fri Jul 20 11:11:18 2007 +0200

    [ALSA] Add description about probe_mask option for snd-hda-intel
    Added a brief description about probe_mask option for snd-hda-intel.
    Signed-off-by: Takashi Iwai <[EMAIL PROTECTED]>
    Signed-off-by: Jaroslav Kysela <[EMAIL PROTECTED]>
 Documentation/sound/alsa/ALSA-Configuration.txt |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt 
index 297ff0d..32124bf 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -759,6 +759,7 @@ 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 
+    probe_mask  - Bitmask to probe codecs (default = -1, meaning all slots)
     single_cmd  - Use single immediate commands to communicate with
                codecs (for debugging only)
     enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
@@ -966,6 +967,17 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. 
This was removed.
     from the irq.  Remember this is a last resort, and should be
     avoided as much as possible...
+    MORE NOTES ON "azx_get_response timeout" PROBLEMS:
+    On some hardwares, you may need to add a proper probe_mask option
+    to avoid the "azx_get_response timeout" problem above, instead.
+    This occurs when the access to non-existing or non-working codec slot
+    (likely a modem one) causes a stall of the communication via HD-audio
+    bus.  You can see which codec slots are probed by enabling
+    CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
+    proc files.  Then limit the slots to probe by probe_mask option.
+    For example, probe_mask=1 means to probe only the first slot, and
+    probe_mask=4 means only the third slot.
     The power-management is supported.
   Module snd-hdsp
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