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#1 2011-05-20 22:03:32

jwm-art
Member
Registered: 2011-02-01
Posts: 87

ALSA device group ownership with 2.6.39-1

Run updates earlier and now MIDI applications no longer have permissions to use /dev/snd/seq. Seems while other devices within /dev/snd are in the audio group, /dev/snd/seq is not. I'm not sure what is the root cause.

snd_ice1712         57822   3
snd_ice17xx_ak4xxx  2364    1   snd_ice1712
snd_ak4xxx_adda     8797    2   snd_ice1712,snd_ice17xx_ak4xxx
snd_cs8427          6673    1   snd_ice1712
snd_ac97_codec      110807  1   snd_ice1712
snd_pcm             71032   4   snd_ice1712,snd_ac97_codec
snd_timer           18896   1   snd_pcm
snd_page_alloc      7017    1   snd_pcm
snd_i2c             3865    2   snd_ice1712,snd_cs8427
snd_mpu401_uart     5779    1   snd_ice1712
snd_rawmidi         18826   1   snd_mpu401_uart
snd_seq_device      5100    1   snd_rawmidi
snd                 55336   14  snd_ice1712,snd_ak4xxx_adda,snd_cs8427,snd_ac97_codec,snd_pcm,snd_timer,snd_i2c,snd_mpu401_uart,snd_rawmidi,snd_seq_device
drwxr-xr-x  2 root root       60 May 20 21:43 by-path
crw-rw----+ 1 root audio 116,  4 May 20 21:43 controlC0
crw-rw----+ 1 root audio 116,  3 May 20 21:43 pcmC0D0c
crw-rw----+ 1 root audio 116,  2 May 20 21:43 pcmC0D0p
crw-------  1 root root  116,  1 May 20 21:43 seq
crw-rw----+ 1 root audio 116, 33 May 20 21:43 timer

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#2 2011-05-20 22:18:29

falconindy
Developer
From: New York, USA
Registered: 2009-10-22
Posts: 4,111
Website

Re: ALSA device group ownership with 2.6.39-1

This is more likely related to udev 169/170 than it is the kernel update.

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#3 2011-05-20 22:31:11

jwm-art
Member
Registered: 2011-02-01
Posts: 87

Re: ALSA device group ownership with 2.6.39-1

falconindy wrote:

This is more likely related to udev 169/170 than it is the kernel update.

Any ideas on where to look to start figuring out the [probable misconfiguration] problem? /etc/udev/rules.d only has two files: 10-local.rules and 70-infrared.rules.

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#4 2011-05-20 22:38:02

falconindy
Developer
From: New York, USA
Registered: 2009-10-22
Posts: 4,111
Website

Re: ALSA device group ownership with 2.6.39-1

/lib/udev/rules.d has plenty more... I would say compare to the previous version

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#5 2011-05-21 12:46:38

jwm-art
Member
Registered: 2011-02-01
Posts: 87

Re: ALSA device group ownership with 2.6.39-1

I submitted a bug report:

http://bugs.archlinux.org/task/24362#comment77359

It seems the /dev/snd/seq node is created earlier than others in /dev/snd. The suggested work-a-round is to add snd_seq to the modules array.

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