Bug 5446 - Audio bangs on poweroff
Audio bangs on poweroff
Product: Drivers
Classification: Unclassified
Component: Sound(ALSA)
i386 Linux
: P2 normal
Assigned To: Jaroslav Kysela
Depends on:
  Show dependency treegraph
Reported: 2005-10-15 00:07 UTC by Oleksij Rempel (fishor)
Modified: 2008-09-22 15:55 UTC (History)
4 users (show)

See Also:
Kernel Version: 2.6.16
Tree: Mainline
Regression: ---

Add reboot notifier (1.12 KB, patch)
2005-10-17 03:15 UTC, Takashi Iwai
Details | Diff
Add PCI shutdown callback (548 bytes, patch)
2005-10-17 06:39 UTC, Takashi Iwai
Details | Diff

Description Oleksij Rempel (fishor) 2005-10-15 00:07:13 UTC
Most recent kernel where this bug did not occur: 2.6.12; 2.6.13; 2.6.14-rc3
Distribution:Ubuntu Breezy
Hardware Environment:laptop samsung nv5000, sound ES1988 Allegro-1
Software Environment:kernel + alsa
Problem Description:
Power_off process is not correct, sound device mas to be disabled before power
off. This is realy dangerous, if device is not disabled it's make laut sound
impuls wich can damage hardware.
Comment 1 Oleksij Rempel (fishor) 2005-10-15 00:09:35 UTC
Actualy i don't have rigt to say it's not correct but dangerous :o)
Comment 2 Oleksij Rempel (fishor) 2005-10-15 04:48:21 UTC
I added "modprobe -r snd-maestro3" to halt script. It's halp power_off properly,
with out any krash_sound but it's need alsa compiled as module.
Comment 3 Takashi Iwai 2005-10-17 03:14:57 UTC
Does the patch below help?
Comment 4 Takashi Iwai 2005-10-17 03:15:59 UTC
Created attachment 6323 [details]
Add reboot notifier
Comment 5 Takashi Iwai 2005-10-17 06:39:47 UTC
Created attachment 6325 [details]
Add PCI shutdown callback
Comment 6 Takashi Iwai 2005-10-17 06:40:46 UTC
The second one (in comment #5) is better.
Comment 7 Oleksij Rempel (fishor) 2005-10-17 07:04:53 UTC
I tryed therst one but it's not helping.
The secend one i will try leater. I tryed poweroff with "alsactl power off"
added to the halt script ... it's working too.
Comment 8 Oleksij Rempel (fishor) 2005-10-18 00:47:34 UTC
I tryed second one, result negative. 
Comment 9 Oleksij Rempel (fishor) 2005-10-18 00:48:18 UTC
Both together don't help too. 
Comment 10 Len Brown 2005-10-19 18:29:44 UTC
I'm confused about the kernel version.
The Kernel version box above says 2.6.12, 2.6.13, 2.6.14-rc3
Does the problem exist or not exist in those kernel versions?

Is there a version where the problem does not exist?
If yes, what is the most recent version where there is no problem?
Comment 11 Oleksij Rempel (fishor) 2005-10-19 22:21:43 UTC
This is tested wersions and all of them with this problem. 

> Is there a version where the problem does not exist?
i didn't found it. I think no.

Sory if it's confusing you.
Comment 12 Oleksij Rempel (fishor) 2005-10-31 01:07:39 UTC
I ting Bug 5398 depends on power managment like this one too.
Comment 13 Natalie Protasevich 2008-03-14 23:31:27 UTC
Alexey, please confirm if bug exists with latest kernel.

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