I am having the same problem.
I am trying to install Half-Life with WineX and I get the following error when the SETUP.EXE tries to test my sound.
err:wave:OSS_OpenDevice Can't set format to 8 (16)
err:wave:OSS_OpenDevice Can't set sample_rate to 48000 (11025)
Music from Xmms works fine! I get this message when I use the command 'esd' though.
unsupported playback rate: 44100
Audio device open for 44.1Khz, stereo, 16bit failed
Trying 44.1Khz, 8bit stereo.
unsupported sound format: 32
Audio device open for 44.1Khz, stereo, 8bit failed
Trying 48Khz, 16bit stereo.
I am running a 2.4.20 kernel and have SiS7012 On-board sound.