linux-kernel - Re: snd-hda-intel prevents machine to power off

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Message-ID: <s5hskqgbt4h.wl%tiwai@suse.de>
Date:	Tue, 28 Oct 2008 17:07:42 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: snd-hda-intel prevents machine to power off

At Tue, 28 Oct 2008 13:59:33 -0200,
Luiz Fernando N. Capitulino wrote:
> 
> 
>  Hi Takashi,
> 
>  If I have some process with the sound device opened in my eeepc
> (say KDE's kmix) and try to power off the machine, for example with:
> 
> # echo o > /proc/sysrq-trigger
> 
>  The machine will not power off.

At which point does it stop?
What shows alt-sysrq-t (or w) output?

>  But it does work if I remove the snd-hda-intel module before issuing
> the echo above.
> 
>  This problem seems to be pretty popular among distros, I could find
> it reported for Mandriva, Ubuntu and Fedora.

Hmm, I haven't heard of unfixed issues.

>  Its workaround is also documented in a few wikis: people are doing
> a 'rmmod snd-hda-intel' in the last halt stage (ie, halt script
> in etc).

I hate wiki or forum just recommending a wrong workaround :)


thanks,

Takashi
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