On Mon, 31 May 2010, VDR User wrote:

On Mon, May 31, 2010 at 1:43 PM, Jaroslav Kysela perex@perex.cz wrote:

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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.

With xrun_debug 25 I get sound for about 1 second and then it disappears. 29 of course works fine as mentioned previously.

Thanks. Here is next correction:

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 170610e..b6ba210 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1910,11 +1910,11 @@ 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; - azx_dev->start_wallclk = wallclk; + azx_dev->start_wallclk += wallclk; return 1; /* OK, it's fine */ }

Jaroslav

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