Re: [gentoo-user] mdev: sound is only working some of the time.

[Pandu Poluan <pandu@poluan.info>]

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On Mar 21, 2012 6:22 PM, "Alan Mackenzie" <acm@muc.de> wrote:
>
> Hello, Pandu.
>
> On Wed, Mar 21, 2012 at 07:35:14AM +0700, Pandu Poluan wrote:
> > 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).
>
> No, it was just that one device belonging to root:root.  This is
> mysterious indeed.
>
> > 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?
>
> mdev -s wasn't in my /sbin/linuxrc.  It is now.  It hasn't made any
> difference to that wayward device.
>
> As I said to Walt, I've solved the problem by turfing out pulseaudio.
>

Strange...

Do you use mdev to handle hotplugs, btw?

Rgds,

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