sound card is working well inside SuSE and everything is ok there. But when I install Windows 7 or XP inside Xen Virtualization software, I can't use sound card and Windows is unable to find any sound hardware.
I don't use Xen, but the documentation for the configuration file for the guest mentions the following line which is initially commented-out:
Other documentation, Configuration file for unmodified VMX guests, mentions another parameter:
You might check what values have these variables, but I don't really like the words "under development".