Francois Gouget wrote:

Why does DirectSound need full-duplex?
It doesn't seem like it should be needed for simple playback.
In fact I said I would send a patch to change this ERR to a WARN and I
guess this means I'm overdue...



According to the comment in the code, you need to mmap the memory R/W in
linux for it to work. R/W permission implies full duplex the way the driver is
currently written.


I have not tried different mmap permissions to see if the linux bug is real or
still exists. It's weird to do it that way but it's a work around for a bug that
may not be valid any more. Can the person that wrote the code comment?





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