[mythtv-users] Permissions on devices?

[Joe Schmidt]

When I checked out the /etc/devfsd.conf, it appeared to me that 
/dev/sound/dsp was the one that was set to belong to the audio group! So 
I went into setup, set it to use that as the audio capture device, and 
tried out the frontend again. Here's my new errors:

Delaying to next trigger: 22044990
Delaying to next trigger: 32635596
Audio buffer overflow, audio data lost!
Audio buffer overflow, audio data lost!
Audio buffer overflow, audio data lost!

And when I use /dev/dsp0...

lotus mythtv # mythfrontend
connecting to backend server: 127.0.0.1:6543
adding: lotus.njit.edu as a player 1
adding: lotus.njit.edu as a player 0
adding: lotus.njit.edu as a player 0
adding: lotus.njit.edu as a remote ringbuffer
Changing from None to WatchingLiveTV
opened vbi device
Changing from None to WatchingLiveTV
strange error flushing buffer ...
Over/underscanning. V: 0.000000, H: 0.000000, XOff: 0, YOff: 0
Using XV port 61
Delaying to next trigger: 18049700
Delaying to next trigger: 19382356
Delaying to next trigger: 17799915

Barry Davis wrote:

> 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
>>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
>