Gentoo Archives: gentoo-user

From: Pandu Poluan <pandu@××××××.info>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] mdev: sound is only working some of the time.
Date: Wed, 21 Mar 2012 00:36:57
Message-Id: CAA2qdGV0NhcdtOigWHq99rKneYgfSUCH1oJ_v6mNf-a=RCUu4w@mail.gmail.com
In Reply to: [gentoo-user] mdev: sound is only working some of the time. by Alan Mackenzie
1 On Mar 21, 2012 5:36 AM, "Alan Mackenzie" <acm@×××.de> wrote:
2 >
3 > Hi, all.
4 >
5 > Got a problem with my system running under mdev. When I try to play CDs
6 > (with aqualung feeding into PulseAudio), no sound comes out. However,
7 > when I listen to an audio section from a newspaper page such as
8 > www.tagesschau.de (no idea what audio format) it works.
9 >
10 > Clearly this is something to do with mdev. I had a look at the devices
11 > in /dev, searching for those in group audio. Under udev, I find the
12 > following as device nodes:
13 >
14 > adsp audio dsp mixer mixer1 sequencer sequencer2.
15 >
16 > Under mdev, all of these bar one are symlinks into the real nodes in a
17 > subdirectory. The odd man out is mixer1 which is a device node, but
18 > with owner/group begin root/root (rather than root/audio).
19 >
20 > Can anybody suggest any fix, or further areas of exploration? Thanks!
21 >
22
23 That's indicative that it's the kernel doing the populating (that is,
24 everything belongs to root:root). That means, mdev hasn't got the chance to
25 'restructure' the /dev directory (that is, rename and/or move and/or chown
26 devices).
27
28 Does 'mdev -s' exist in your /sbin/linuxrc? Can you post your linuxrc here?
29
30 Rgds,

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Re: [gentoo-user] mdev: sound is only working some of the time. Alan Mackenzie <acm@×××.de>