[mythtv-users] Permissions on devices?

[Barry Davis]

If its a permission thing with devfs you either need to modify 
/etc/devfsd.conf or you need to add you user name to the audio group in 
/etc/group. There should be a line which reads "audio:x:17:root" - 
change it to "audio:x:17:root,youruser".
I think the audio devices get created with permissions 0660 for groups 
root and audio when the soundcard module is pulled in.
I don't have a soundcard in my work pc anymore so I can't be sure, but I 
had it working last year.

Joe Schmidt wrote:

> Thanks for the reply! I'm using devfs, so maybe that handles symbolic 
> links in /dev a bit differently. *shrug*
>
> I now receive the following errors flooded through my screen when I 
> try to watch live TV.
>
> only read -1 from 4096 bytes from '/dev/dsp'
> read audio: File descriptor in bad state
> ran out of free AUDIO buffers :-(
>
> I'm not sure what I'm doing wrong. Maybe I messed up installing ALSA 
> somehow? I followed the instructions to the letter (I think..)
>
> Thanks for the continued help from everyone. :-)
>
>
> Ray Olszewski wrote:
>
>> At 11:50 PM 5/7/2003 -0400, Joe Schmidt wrote:
>> [...]
>>
>>> Thanks to the advice of someone else on the list, I think I have my 
>>> sound card set up properly. However, I receive errors while trying 
>>> to watch Live TV, and then exiting from LiveTV:
>>> [...]
>>>
>>> Here are the permissions on the two dvices mentioned:
>>> $ ls dsp -l && ls mixer -l
>>> lr-xr-xr-x    1 root     audio           9 May  8 11:24 dsp -> 
>>> /dev/dsp0
>>> lr-xr-xr-x    1 root     root           11 May  8 11:24 mixer -> 
>>> /dev/mixer0
>>>
>>> I tried changing dsp to group audio and making sure I was a member 
>>> of audio, but it did not seem to make a difference. (Later, I 
>>> noticed that all users have read and execute permissions anyway).
>>>
>>> How does everyone else have their permissions set up?
>>
>>
>>
>> The permissions you are listing are associated with the symlink, not 
>> the underlying device. (And they look unlike any symlink permissions 
>> I have ever seen ... on my systems, symlinks always show up as 
>> "lrwxrwxrwx" ... perhaps someone can clarify that part?)
>>
>> Anyway ... check the permissions on the /dev/dsp0 and /dev/mixer0 . 
>> They need to be mode 660 (you need write permission in order to use 
>> /dev/dsp0 for output) with group audio and the mythtv userid part of 
>> group audio. (Obvious other variants are possible, such as mode 666, 
>> but that's the setup I usually use.)
>>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
>