On Wed, Nov 20, 2013 at 09:39:26PM +0100, Francesco Turco wrote: > I'm not sure if asking in qemu-devel is the right thing to do, as > I'm not a QEMU developer, but stefanha in the #qemu IRC channel told > me to do so. :-) > > I'm running QEMU 1.6.1 on a 64-bit Gentoo Linux system. The guest > operating system is Windows 7 32-bit. I get multiple identical > warning messages when using the ac97 or hda sound cards: > > > ALSA lib > > /var/tmp/portage/media-libs/alsa-lib-1.0.27.2/work/alsa-lib-1.0.27.2/src/pcm/pcm.c:7843:(snd_pcm_recover) > underrun occurred > > The difference between ac97 and hda is that the former works well, > while the latter causes the sound to be garbled. > > /var/tmp/portage is the directory where Portage, the Gentoo package > manager, builds programs. I don't know why it is mentioned in the > error message. > > I also don't know if this is an ALSA problem or a QEMU problem. > > The command I use is: > > > qemu-system-i386 -cpu host -m 1G -k it -drive > file=~/QEMU/windows-7.img,media=disk,index=0 -vga std -net nic -net > user -enable-kvm -display sdl -soundhw ac97 > > My real sound card is an Intel HD Audio: > > > lspci | grep "Audio device" > > 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD > Audio Controller (rev 02)
Extra info from IRC discussion: The guest is just playing system sounds. This is *not* a real-time audio app with low-latency settings that easily hits underruns. Stefan
