[alsa-devel] Problem with snd_hda_intel from 05-27-2010 snapshot

[Jaroslav Kysela]

On Mon, 31 May 2010, VDR User wrote:

> On Mon, May 31, 2010 at 11:30 AM, Jaroslav Kysela <perex at perex.cz> wrote:
>> Thanks. Could you try this patch?
>>
>> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
>> index 170610e..ac3dbab 100644
>> --- a/sound/pci/hda/hda_intel.c
>> +++ b/sound/pci/hda/hda_intel.c
>> @@ -1910,7 +1910,7 @@ static int azx_position_ok(struct azx *chip, struct
>> azx_dev *azx_dev)
>>        if (WARN_ONCE(!azx_dev->period_bytes,
>>                      "hda-intel: zero azx_dev->period_bytes"))
>>                return -1; /* this shouldn't happen! */
>> -       if (wallclk <= azx_dev->period_wallclk &&
>> +       if (wallclk < (azx_dev->period_wallclk * 3) / 2 &&
>>            pos % azx_dev->period_bytes > azx_dev->period_bytes / 2)
>>                /* NG - it's below the first next period boundary */
>>                return bdl_pos_adj[chip->dev_index] ? 0 : -1;
>>
>> -----
>
> I've got a bit of a strange result.  With the above patch (and the
> wallclk logging patch from your previous email), sound does not work.
> However, it _does_ start working only if I `echo 29 >
> /proc/asound/card1/pcm3p/xrun_debug`.  I tested these results with a
> reboot in between each attempt just to make sure I'm working with a
> clean boot.  I can't imagine what's causing this weird condition.  Any
> ideas?

Try to disable jiffies check (value 25 for xrun_debug). Please, post your 
log for value 29 for inspection. Thanks.

 						Jaroslav

-----
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.