acm at muc
Mar 21, 2012, 6:02 AM
Post #7 of 11
On Wed, Mar 21, 2012 at 07:49:02PM +0700, Pandu Poluan wrote:
Re: mdev: sound is only working some of the time.
[In reply to]
> On Mar 21, 2012 6:22 PM, "Alan Mackenzie" <acm [at] muc> 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 [at] muc> 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.
> Do you use mdev to handle hotplugs, btw?
You mean, like sticking in a USB stick, or turning my printer on? Yes, I
Alan Mackenzie (Nuremberg, Germany).