No audio devices found, but phonon works

[smh36]

Hello all,

I'm working with Qt 4.8 and having a strange problem with audio output.

The example programs which use phonon work perfectly well, however, those which use QtMultimedia cannot find any audio output devices on my system. I've built Qt from source with

@./configure -no-webkit
make
make install@

Has anyone seen this before, or got suggestions of what I have done wrong?

Many thanks for any help.