[Qemu-devel] [Bug 1255303] Re: ALSA underruns occurr when using QEMU

[Francesco Turco]

I'm still using Gentoo Linux on the same 64-bit system, and I can still
reproduce this bug:

qemu-system-i386 -cpu host -m 1G -k it -drive 
file=~/qemu/windows-7-ultimate-x86.qcow2,media=disk,index=0 -vga std -net nic 
-net user -enable-kvm -display sdl -soundhw ac97 -device usb-ehci,id=ehci -usb 
-rtc base=localtime -usbdevice tablet
audio: Failed to create voice `ac97.pi'
audio: Failed to create voice `ac97.mc'
audio: Failed to create voice `ac97.pi'
audio: Failed to create voice `ac97.mc'
ALSA lib 
/var/tmp/portage/media-libs/alsa-lib-1.1.4/work/alsa-lib-1.1.4/src/pcm/pcm.c:8321:(snd_pcm_recover)
 underrun occurred

$ emerge -pv qemu alsa-lib

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] media-libs/alsa-lib-1.1.4::gentoo  USE="python -alisp -debug 
-doc" PYTHON_TARGETS="python2_7" 0 KiB
[ebuild   R    ] app-emulation/qemu-2.9.0-r54::gentoo  USE="aio alsa bzip2 curl 
fdt gnutls jpeg lzo ncurses nls opengl pin-upstream-blobs png python sdl 
seccomp usb vhost-net -accessibility -bluetooth -caps -debug -filecaps 
-glusterfs -gtk -gtk2 -infiniband -iscsi -nfs -numa -pulseaudio -rbd -sasl 
-sdl2 (-selinux) -smartcard -snappy -spice -ssh -static -static-user -systemtap 
-tci {-test} -usbredir -vde -virgl -virtfs -vnc -vte -xattr -xen -xfs" 
LINGUAS="-bg -de_DE -fr_FR -hu -it -tr -zh_CN" PYTHON_TARGETS="python2_7" 
QEMU_SOFTMMU_TARGETS="i386 x86_64 -aarch64 -alpha -arm -cris -lm32 -m68k 
-microblaze -microblazeel -mips -mips64 -mips64el -mipsel -moxie -nios2 -or1k 
-ppc -ppc64 -ppcemb -s390x -sh4 -sh4eb -sparc -sparc64 -tricore -unicore32 
-xtensa -xtensaeb" QEMU_USER_TARGETS="-aarch64 -alpha -arm -armeb -cris -hppa 
-i386 -m68k -microblaze -microblazeel -mips -mips64 -mips64el -mipsel -mipsn32 
-mipsn32el -nios2 -or1k -ppc -ppc64 -ppc64abi32 -ppc64le -s390x -sh4 -sh4eb 
-sparc -sparc32plus -sparc64 -tilegx -x86_64" 0 KiB

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1255303

Title:
  ALSA underruns occurr when using QEMU

Status in QEMU:
  Incomplete

Bug description:
  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_Privato.qcow2,media=disk,index=0 -vga std -net
  nic -net user -enable-kvm -display sdl -soundhw ac97 -device usb-
  ehci,id=ehci -usb -rtc base=localtime -usbdevice tablet

  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)

  Please tell me if you need other informations.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1255303/+subscriptions