Ubuntu Audio Problem

[PhilMan9045]

I just installed Ubuntu Karmic Koala and whenever I play a video or music, the audio fades out until I can't hear anything. I have to unplug my headphones and plug them back in, then play the song again in order for it to work but then it just fades out again. I just have headphones, no speakers. I've tried it with other headphones and it does the same thing. What do I do?

[D-cat]

Does it do this with all programs?

It sounds like theres a "Normalize" or "Compression" function at work and it's set low. Honestly, I don't know if this exists in the sound server settings or not, but some programs have it and maybe your sound card as well?

I'm thinking you could also have a bad capacitor on the sound card, but I don't find that likely if the sound was fine before installing Karmic.

If this happens with all programs, then please show me the outputs of:

lspci -nnk | grep -ia2 audio

aplay -l

(that's APLAY -L in lower case) Thanks.

[PhilMan9045]

First command:
Kernel driver in use: sata_nv
00:10.0 PCI bridge [0604]: nVidia Corporation MCP51 PCI Bridge [10de:026f] (rev a2)
00:10.1 Audio device [0403]: nVidia Corporation MCP51 High Definition Audio [10de:026c] (rev a2)
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
Second:
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0

[D-cat]

And let the questions fly.

While it's a slightly different card, it appears to be the same problem.

Edit:
Wasn't really a "bug report," though I get the feeling from the google search that the MPC51 is known for this problem. I didn't find any solutions.