sound question
Mikkel L. Ellertson
mikkel at infinity-ltd.com
Sun May 20 17:26:51 UTC 2007
Gerhard Magnus wrote:
> My computers are running FC6 and gnome. One of them, A, is connected to
> the stereo. Everything works fine on A but I want to control the sound
> remotely, from B. So, while logged on to B, I ssh to A and start up
> xmms. I get the message:
>
> "Couldn't open audio (on A). Please check that your soundcard is
> configured properly, you have the correct output plugin selected, no
> other program is blocking the soundcard."
>
> I get this error only if no one has already logged on to A directly,
> without having gone through ssh. If someone is logged on to A (at A)
> and then I ssh from B to A and start xmms, it plays normally.
>
> Why is this and is there some workaround? Thanks for the help!
>
> Jerry
>
What you are running into is a permission problem caused by the way
console.perms works. When a user logs into the console, (local
login) they are given "ownership" of a bunch of non-sharable
devices. When they log out, the "ownership" goes back to the default
user - root in most cases. Logging in over ssh in not a console
login, so permissions are not changed.
If you want to see the default setup, take a look at
/etc/security/console.perms and the files in
/etc/security/console.perms.d. You can also look at the
console.perms man page.
Mikkel
--
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!
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