Public bug reported:
After upgrading QEMU packages from:
8.2.2+ds-0ubuntu1.13 → 8.2.2+ds-0ubuntu1.14
the host system (Ubuntu 24.04) starts experiencing periodic UI
stuttering.
Symptoms:
- Short freezes (~100–300 ms) during typing, scrolling, animations
- Affects entire desktop (terminal, browser, remmina, etc.)
- Not limited to any specific application
- Appears after some uptime
Important observations:
- The issue persists even after shutting down the VM
- Rebooting the system temporarily resolves the issue
- Downgrading QEMU back to 8.2.2+ds-0ubuntu1.13 completely resolves the issue
This suggests a regression possibly affecting the graphics stack
(OpenGL/virgl/SPICE interaction).
Steps to reproduce:
1. Install Ubuntu 24.04
2. Upgrade QEMU packages to 8.2.2+ds-0ubuntu1.14
3. Start a Windows 11 VM using QEMU (virt-manager)
4. Use the system normally
5. After some time, UI stuttering appears
6. Stop the VM → stuttering continues
7. Reboot → issue temporarily disappears
Downgrade to 8.2.2+ds-0ubuntu1.13 → issue no longer occurs.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: qemu-system-x86 1:8.2.2+ds-0ubuntu1.13
ProcVersionSignature: Ubuntu 6.17.0-20.20~24.04.1-generic 6.17.13
Uname: Linux 6.17.0-20-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 7 23:12:33 2026
InstallationDate: Installed on 2025-07-13 (268 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
KvmCmdLine: COMMAND STAT EUID RUID PID PPID %CPU COMMAND
MachineType: System manufacturer System Product Name
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.17.0-20-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash amdgpu.seamless=1
vt.handoff=7
SourcePackage: qemu
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/13/2025
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5031
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX X570-E GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr5031:bd01/13/2025:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXX570-EGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2147482
Title:
Severe UI stuttering on host after upgrading QEMU from
8.2.2+ds-0ubuntu1.13 to .14 (fixed by downgrade)
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