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From: johannes <1906184@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1906184] [NEW] Lots of stuttering/crackling in guest sound
Date: Sun, 29 Nov 2020 21:00:06 -0000	[thread overview]
Message-ID: <160668360643.8467.1174467621705698044.malonedeb@soybean.canonical.com> (raw)

Public bug reported:

When listening to music (e.g. with VLC) or watching Youtube on the
guest, there's lots of stuttering and crackling in the sound.


Tested with the following QEMU start commands:

qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga virtio -soundhw hda
-display sdl,gl=on

qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda
-display sdl

qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda
-display gtk


If I use the following command (QXL graphics, "remote" access via SPICE over unix socket), stuttering is not completely gone but MUCH less annoying:

qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
./linux/kubuntu-20.04-desktop-amd64.iso -boot d -soundhw hda -vga qxl
-device virtio-serial-pci -device
virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev
spicevmc,id=spicechannel0,name=vdagent -spice
unix,addr=/tmp/vm_spice.socket,disable-ticketing

and this command for accessing the VM:
remote-viewer spice+unix:///tmp/vm_spice.socket 


Guest: Kubuntu 20.04 64-bit (live), but occurs with many other as well
Host: Arch Linux, with KDE desktop
CPU: Intel Xeon E3-1230v2 (4 cores + hyperthreading)
RAM: 16 GB
GPU: Nvidia GTX 980 Ti

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: linux sound stuttering

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1906184

Title:
  Lots of stuttering/crackling in guest sound

Status in QEMU:
  New

Bug description:
  When listening to music (e.g. with VLC) or watching Youtube on the
  guest, there's lots of stuttering and crackling in the sound.

  
  Tested with the following QEMU start commands:

  qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
  ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga virtio -soundhw
  hda -display sdl,gl=on

  qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
  ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda
  -display sdl

  qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
  ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda
  -display gtk

  
  If I use the following command (QXL graphics, "remote" access via SPICE over unix socket), stuttering is not completely gone but MUCH less annoying:

  qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom
  ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -soundhw hda -vga qxl
  -device virtio-serial-pci -device
  virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev
  spicevmc,id=spicechannel0,name=vdagent -spice
  unix,addr=/tmp/vm_spice.socket,disable-ticketing

  and this command for accessing the VM:
  remote-viewer spice+unix:///tmp/vm_spice.socket 


  Guest: Kubuntu 20.04 64-bit (live), but occurs with many other as well
  Host: Arch Linux, with KDE desktop
  CPU: Intel Xeon E3-1230v2 (4 cores + hyperthreading)
  RAM: 16 GB
  GPU: Nvidia GTX 980 Ti

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1906184/+subscriptions


             reply	other threads:[~2020-11-29 21:07 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-29 21:00 johannes [this message]
2021-05-10  4:44 ` [Bug 1906184] Re: Lots of stuttering/crackling in guest sound Thomas Huth
2021-07-10  4:17 ` Launchpad Bug Tracker

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