18 Apr
2004
18 Apr
'04
3:56 p.m.
I cannot figure out how to automatically set permissions of
/proc/asound/card1/pcm0p/oss. I tried Having the line
options snd major=116 cards_limit=4 device_mode=0660
in /etc/modutils/alsa, but alsa won't come up, saying: "Unknown symbol
device_mode". Google tell's me that is a common problem. Is there a new
way of setting the permissions of /proc/asound/card1/pcm0p/oss or /proc
in general???
This is on kernel 2.6.4...
--
peace, love & harmony
Atte
http://www.atte.dk
23 Apr
23 Apr
12:45 p.m.
Atte André Jensen wrote:
I cannot figure out how to automatically set
permissions of
/proc/asound/card1/pcm0p/oss. I tried Having the line
options snd major=116 cards_limit=4 device_mode=0660
in /etc/modutils/alsa, but alsa won't come up, saying: "Unknown symbol
device_mode".
This is only for device nodes in /dev/, if devfs is enabled.
Is there a new way of setting the permissions of
/proc/asound/card1/pcm0p/oss or /proc in general???
There is no way, except changing ALSA's source code.
The permissions of pcmxx/oss are set in the snd_pcm_oss_proc_init()
function in alsa-kernel/core/oss/pcm_oss.c (entry->mode).
Regards,
Clemens
2:25 p.m.
Clemens Ladisch wrote:
Bwadr. Don't wanna mess with that :-)
--
peace, love & harmony
Atte
http://www.atte.dk
Atte André Jensen wrote:
But why does alsa complain about "Unknown symbol device_mode" then? A
bug (in the kernel or alsa)? Or is this wrong in my .config:
[atte@aarhus linux]$ grep -i dev .config | grep -i fs
CONFIG_USB_DEVICEFS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVPTS_FS_XATTR is not set
If I get alsa to recognize the device_mode=0660 (for instance by
changing my potentially wrong kernel .config), where would the
oss-emulation of my card that is now at /proc/asound/card1/pcm0p/oss
show up in /dev? And are one of the devices (/proc/... or /dev) better
in terms of a) stability b) latency c) supportedness d) something else
or are they equal?
I cannot figure out how to automatically set
permissions of
/proc/asound/card1/pcm0p/oss. I tried Having the line
options snd major=116 cards_limit=4 device_mode=0660
in /etc/modutils/alsa, but alsa won't come up, saying: "Unknown symbol
device_mode".
This is only for device nodes in /dev/, if devfs is enabled. Is there a new
way of setting the permissions of
/proc/asound/card1/pcm0p/oss or /proc in general???
There is no way, except
changing ALSA's source code.
The permissions of pcmxx/oss are set in the snd_pcm_oss_proc_init()
function in alsa-kernel/core/oss/pcm_oss.c (entry->mode).
26 Apr
26 Apr
4:30 a.m.
Atte André Jensen wrote:
Clemens Ladisch wrote:
Because devfs isn't enabled.
Atte André Jensen wrote:
But why does alsa complain about "Unknown symbol device_mode" then?
...
# CONFIG_DEVFS_FS is not set in /etc/modutils/alsa, but alsa won't come up,
saying: "Unknown symbol
device_mode".
This is only for device nodes in /dev/, if devfs is enabled. If I get alsa to recognize the device_mode=0660 (for
instance by
changing my potentially wrong kernel .config),
Your kernel configuration isn't wrong. If you don't know what devfs
is, don't enable it.
where would the oss-emulation of my card that is now
at
/proc/asound/card1/pcm0p/oss show up in /dev?
It wouldn't. The files in /proc/asound are just for debugging and/or
tuning.
The files in /dev are used to actually access the sound devices (OSS
emulation devices like /dev/dsp, and ALSA devices in /dev/snd/). If
devfs is not enabled, you can change the permissions of the files in
/dev with chmod.
HTH
Clemens
7651
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Atte André Jensen -
Clemens Ladisch