On 2011-06-09 09:08, André Weidemann wrote: > Hi Jan, > > On 09.06.2011 08:53, Jan Kiszka wrote: >> On 2011-06-09 08:19, André Weidemann wrote: >>> Hi Gerd, >>> >>> On 08.06.2011 14:49, Gerd Hoffmann wrote: >>>> Hi, >>>> >>>>> The sound device shows up under Windows7 and drivers are installed >>>>> automatically. Unfortunately it does not work. All the players I >>>>> tried, >>>>> did not even start playing the sound file, although they detected the >>>>> DirectSound Device. >>>> >>>> iso xfer's from usb-linux via ehci are flaky for reasons not yet >>>> tracked >>>> down. >>>> >>>> Any reason why you don't just plug in a virtual sound card? The HDA >>>> emulation should work fine with win7. >>> >>> Using the hda driver was my first attempt. But the result was not very >>> convincing. When playing mp3s inside the VM, I could hear music coming >>> from the speakers, but the sound was very choppy and too slow. It was no >>> joy listening to it. >> >> Does "export QEMU_AUDIO_DAC_TRY_POLL=0" before invoking qemu helps? It >> depends on your host-side interface. Using ALSA here, it is generally >> required. >> >> Note that this discussion rather belongs on qemu-devel. > > Thank you very much. Setting the variable did the trick. > Could this perhaps be included in the man page? I am sure there will be > others who will eventually run into the same problem as I did. It is a long-standing issue of QEMU that I always wanted to understand but never found the time for. CC'ing malc, maybe he has a good idea how to finally attack this. Jan
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