At Wed, 06 Sep 2006 15:17:20 +0200,
Dominique Dumont wrote:
>
> Dominique Dumont <[EMAIL PROTECTED]> writes:
>
> > So far, I've noticed that:
> > - Playing ac3 while loading PATA drive (same commands) works perfectly
> > - Playing PCM (with mplayer) on spdif while loading SATA leads to high
> > frequency noises (like a constinuous scritch-scritch)
>
> I've just tried the spdif output of my motherboard (a7n8x deluxe) with
> snd_intel8x0 driver.
>
> While using SATA (still with md5sum) the PCM output works fine.
>
> I cannot test snd_intel8x0 ac3 output because of bug 411 [1].
> But DTS output is working fine also.
>
> I also tried (just to compare), DTS output (still with md5sum running
> on sata device) with snd_emu10k1 driver and it fails: the dts light on
> my amp switches on and off constinuously.
>
> So the problem seems to be specific to snd_emu10k1 driver.
Does the patch below have any influence?
The patch was necessary to run a52 plugin on emu10k1 on my test
system.
Takashi
diff -r f81fd8f8f24c pci/emu10k1/emupcm.c
--- a/pci/emu10k1/emupcm.c Thu Apr 13 12:58:06 2006 +0200
+++ b/pci/emu10k1/emupcm.c Tue Apr 18 12:49:37 2006 +0200
@@ -1641,6 +1641,10 @@ static int snd_emu10k1_fx8010_playback_o
runtime->hw = snd_emu10k1_fx8010_playback;
runtime->hw.channels_min = runtime->hw.channels_max = pcm->channels;
runtime->hw.period_bytes_max = (pcm->buffer_size * 2) / 2;
+ /* we need to fill the whole buffer */
+ snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+ pcm->buffer_size * 2,
+ pcm->buffer_size * 2);
spin_lock_irq(&emu->reg_lock);
if (pcm->valid == 0) {
spin_unlock_irq(&emu->reg_lock);
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