Installed fc5 x86_64 yesterday. Everything worked just fine, mp3, videos all worked yesterday, when I start my computer today I get a message in RealPlayer saying:

Error
Cannot open audio device. Another application may be using it.

XMMS:

Please check that:
Your soundcard is configured properly
You have the right output plugin selected
No other program is blocking the soundcard

MPlayer:
Fatal Error!
[OpenAl] could not open device

What is this all about?? Everything worked just fine yesterday, a reboot and everything is fu**d up?

Linux amdx64-2200 2.6.16-1.2122_FC5 #1 SMP Sun May 21 15:01:10 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux

System>Administration>Soundcard Detection
Audio Devices:
nVidia
Corporation nForce3 250GB AC'97 Audio Controller
snd-intel8x0

Default audio card: Corporation nFor.......
Default PCM device: NONE??? None in the list either!

Any ideas anyone?

Have you launched any audio/video application as root yesterday ? Check permissions to /dev/dsp

tried to do a chmod 777 to /dev/dsp and /dev/audio
but, when I restart its getting back to this: (no sound before restart either)

my username is fredrik:

crw------- 1 fredrik root 14, 3 May 25 11:51 /dev/dsp
crw------- 1 fredrik root 14, 4 May 25 11:51 /dev/audio

and when I open volume control there is nothing!!???

Please help, what is wrong with this, worked before I started the computer again the other day!

started kde -> soundcard detection
suddenly I could select a card in pcm-device

sound is now working, but in mplayer I get an error

[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such device

but sound is working in mplayer and other programs anyway!!!

but when i try to change volume with volumecontrol, it do not work, have to open it completely, not just using the shortcut in the upper right corner!

what is this error??

i seem to have got both audio and audio1, dsp & dsp1, mixer & mixer1 in /dev

all the permissions for these files are the same....

strange error, want to reinstall, but how long will it go the next time?? strange error, but it work, just some more difficult to use!

I have also installed FC5 and seen very simular problems.

It looks as if the sound system FC5 uses does not allow multiple users.

If Gnome uses it nothing else can, if XMMS uses it
mplayer or Xine can't use it. Even if you have XMMS paused. If XMMS is stoped, then something else can use it.

It is a real pain when in FC4 you can have all the various systems just use the sound simultaniously.

Strangely if you attempt to play multiple sounds using
the esdplay command, then you can get multiple sound output, but only from esdplay, other things then fail.

The pain, the pain.

I also have sound problems after installing FC5. I unloaded all the sound modules, then reloaded with modprobe snd-hda-intel while monitoring the log. As soon as they loaded I got the following message:
Looks like a device conflicts except that /proc/interrupts shows my sound card only on IRQ 20. When I boot with acpi=off, the sound card works.

Hope this helps, but I am stuck...

I solve my problem...

I changed the XMMS output drive from ALSA to "eSound Driver"
and now all three sounds sources seems to be able to co-exist..
XMMS (music) XINE (movies) and esdplay (personal sound notifications)

I'm at least happy.

Where exactly do you make this configuration change?

Start XMMS, and from the menu go
Options -> Preferences
On the first tab "Audio I/O Pluging"
Set the Output Pluging to
eSound Output Plugin 1.2.10 [libesdout.so]

Note this XMMS and the various other xmms packages was installed / upgraded from the FreshRPMs archives...

Here are my installed RPM's for XMMS.
:::Prompt:::>=- rpm -qa | grep xmms
xmms-1.2.10-25.fc5
xmms-flac-1.1.2-26.fc5
xmms-libs-1.2.10-25.fc5
xmms-cdread-0.14-11.fc5
xmms-mp3-1.2.10-16.fc5.rf
xmms-wma-1.0.5-3.fc5.rf

Xine was also installed from FreshRPMs, with w32codecs
installed directly from a tar file from "MPlayer HQ"

esdplay was installed with FC5.

I had this problem in Gentoo linux. Just type a chmod 777 /dev/dsp command to be executed in every boot and everythink will be fine.
The KDE volume meter is mutted or doesn't exist because it can't open the device.

Just put a chmod 777 /dev/dsp in a rc5.d directory as a executable script. In that way the chmod command will execute every boot and will give new permission on your deviec. That the KDE will open device normally.

Thanks A.Thyssen!