linux-kernel - 2.6.24-rc7, intel audio: alsa doesn't say a beep

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Date:	Mon, 07 Jan 2008 20:53:33 +0100
From:	Harald Dunkel <harald.dunkel@...nline.de>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.24-rc7, intel audio: alsa doesn't say a beep

Hi folks,

Upgrading from 2.6.24-rc6 to rc7 Alsa stopped working for me. I still
can access /dev/dsp, change the volume and so on, but the speakers
are quiet. Moving back to rc6 there is no such problem.

Of course the config files are the same (except for some new
CONFIG_SLABINFO variable).


lspci says:

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)
00:1b.0 0403: 8086:284b (rev 02)

% aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: STAC92xx Digital [STAC92xx Digital]
   Subdevices: 1/1
   Subdevice #0: subdevice #0



The only difference between rc6 and rc7 in sound/pci/hda/hda_intel.c is
this:

diff -ur linux-2.6.24-rc6/sound/pci/hda/hda_intel.c linux-2.6.24-rc7/sound/pci/hda/hda_intel.c
--- linux-2.6.24-rc6/sound/pci/hda/hda_intel.c	2007-12-21 02:25:48.000000000 +0100
+++ linux-2.6.24-rc7/sound/pci/hda/hda_intel.c	2008-01-06 22:45:38.000000000 +0100
@@ -555,7 +555,8 @@
  		}
  		if (!chip->rirb.cmds)
  			return chip->rirb.res; /* the last value */
-		schedule_timeout_uninterruptible(1);
+		udelay(10);
+		cond_resched();
  	} while (time_after_eq(timeout, jiffies));

  	if (chip->msi) {


Do you think this could be related to the problem?


Any hint would be highly appreciated. Please mail if I can help to
track this down.


Regards

Harri

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