Just a couple of notes on this.
1. For those with working ALSA sounds, but ALSA hangs on shutdowns
lasting about 2.5 minutes, I believe our bug fix is mentioned
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.5 --
released November 7th. (I don't know how soon we will see it through
normal channels -- can anyone advise?)
commit a858c06703057cfdd142184e536c3ba36c45000e
Author: Takashi Iwai <[EMAIL PROTECTED]>
Date: Thu Oct 30 19:10:15 2008 +0000
ALSA: hda - Add reboot notifier
commit 0cbf00980f0fc4cc064a15ab3dfce19b5fae9130 upstream
The current snd-hda-intel driver seems blocking the power-off on some
devices like eeepc. Although this is likely a BIOS problem, we can add
a workaround by disabling IRQ lines before power-off operation.
This patch adds the reboot notifier to achieve it.
The detailed problem description is found in bug#11889:
http://bugme.linux-foundation.org/show_bug.cgi?id=11889
Tested-by: Luiz Fernando N. Capitulino <[EMAIL PROTECTED]>
Signed-off-by: Takashi Iwai <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
2. It's possible that this bug report is a duplicate of bug#126140.
I'm not sure. That would make this a very old bug.
That reporter noted that doing an rmmod of snd_hda_intel prior to
shutdown avoided the hang. A similar solution posted at
http://bugzilla.kernel.org/show_bug.cgi?id=7195#c3 (status NEW for over
2 years) describes putting similar entries in a shutdown script. Another
commenter at https://bugs.launchpad.net/ubuntu/+source/linux-
source-2.6.22/+bug/126140/comments/38 says that using aggressive power
saving mentioned
http://www.thinkwiki.org/wiki/How_to_enable_AC97_power_saving#HDA_audio_subsystem
softens the problem.
More recently, many are reporting, especially on ubuntuforum, that doing
an ifdown on their active network avoids this ALSA hang on shutdown --
https://bugs.launchpad.net/ubuntu/+source/alsa-
utils/+bug/274995/comments/25 mentions it as well.
That the workarounds are different makes me wonder whether these
actually are duplicates.
Good luck, all!
--
MASTER storing ALSA mixer element values during shutdown hangs
nondeterministically if non-loopback network interfaces are still up
https://bugs.launchpad.net/bugs/274995
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