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Subject: Re: [gentoo-user] mdev: sound is only working some of the time.
From: Pandu Poluan <pandu@poluan.info>
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On Mar 21, 2012 5:36 AM, "Alan Mackenzie" <acm@muc.de> wrote:
>
> Hi, all.
>
> Got a problem with my system running under mdev. When I try to play CDs
> (with aqualung feeding into PulseAudio), no sound comes out. However,
> when I listen to an audio section from a newspaper page such as
> www.tagesschau.de (no idea what audio format) it works.
>
> Clearly this is something to do with mdev. I had a look at the devices
> in /dev, searching for those in group audio. Under udev, I find the
> following as device nodes:
>
> adsp audio dsp mixer mixer1 sequencer sequencer2.
>
> Under mdev, all of these bar one are symlinks into the real nodes in a
> subdirectory. The odd man out is mixer1 which is a device node, but
> with owner/group begin root/root (rather than root/audio).
>
> Can anybody suggest any fix, or further areas of exploration? Thanks!
>
That's indicative that it's the kernel doing the populating (that is,
everything belongs to root:root). That means, mdev hasn't got the chance to
'restructure' the /dev directory (that is, rename and/or move and/or chown
devices).
Does 'mdev -s' exist in your /sbin/linuxrc? Can you post your linuxrc here?
Rgds,
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<p><br>
On Mar 21, 2012 5:36 AM, "Alan Mackenzie" <<a href=3D"mailto:a=
cm@muc.de">acm@muc.de</a>> wrote:<br>
><br>
> Hi, all.<br>
><br>
> Got a problem with my system running under mdev. =C2=A0When I try to p=
lay CDs<br>
> (with aqualung feeding into PulseAudio), no sound comes out. =C2=A0How=
ever,<br>
> when I listen to an audio section from a newspaper page such as<br>
> <a href=3D"http://www.tagesschau.de">www.tagesschau.de</a> (no idea wh=
at audio format) it works.<br>
><br>
> Clearly this is something to do with mdev. =C2=A0I had a look at the d=
evices<br>
> in /dev, searching for those in group audio. =C2=A0Under udev, I find =
the<br>
> following as device nodes:<br>
><br>
> adsp audio dsp mixer mixer1 sequencer sequencer2.<br>
><br>
> Under mdev, all of these bar one are symlinks into the real nodes in a=
<br>
> subdirectory. =C2=A0The odd man out is mixer1 which is a device node, =
but<br>
> with owner/group begin root/root (rather than root/audio).<br>
><br>
> Can anybody suggest any fix, or further areas of exploration? =C2=A0Th=
anks!<br>
></p>
<p>That's indicative that it's the kernel doing the populating (tha=
t is, everything belongs to root:root). That means, mdev hasn't got the=
chance to 'restructure' the /dev directory (that is, rename and/or=
move and/or chown devices). </p>
<p>Does 'mdev -s' exist in your /sbin/linuxrc? Can you post your li=
nuxrc here? </p>
<p>Rgds, </p>
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