[mythtv-users] Permissions on devices?

[Joe Schmidt]

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.)
>