Comment 1 for bug 144164

Same for me on a Dell Inspiron Laptop after updated to kernel 2.6.22-12. Sound control doesn't work, same error message.

But I discovered it is not a gstreamer-bug!It is a bug of a wrong kernel, that was installed accidentaly after last update.

For me, I need the generic-kernel. After the last update, there were two kernels installed:

2.6.22-12-generic (the right one I need)
2.6.22-12-386 (which is the false one)

In the kernel list the -386 was the standard kernel, so Ubuntu started with the -386 kernel. And with that kernel sound isn't working, neither wlan!

If you start with the right kernel, that is 2.6.22-12-generic, everything is OK!

So the problem isn't gstreamer, it is the false -386 kernel! I will file a bug report for this.