Public bug reported:
Hardware:
- Laptop: ASUSTeK Computer Inc. K42JZ
- CPU: Intel Core i5 M 480
- GPU: AMD Radeon HD 6470M (CAICOS)
- Driver: radeon (not amdgpu)
Software:
- Ubuntu version: 26.04 LTS
- GNOME version: 46
- Kernel version: 7.0.0-15-generic
- gnome-system-monitor version: 46.0-1ubuntu1
Problem:
GNOME System Monitor shows GPU usage 0% all the time, even when running 3D
applications and games.
The GPU is actually working correctly: radeontop shows real GPU load (50-100%)
when running Minecraft 1.20.6.
All other GPU functions work normally, including 3D rendering and video
playback.
Expected behavior:
System Monitor should display correct GPU utilization for graphics cards using
the legacy radeon driver.
Steps to reproduce:
1. Boot Ubuntu 26.04 LTS on a system with AMD HD 6xxx/7xxx series GPU using the
radeon driver
2. Open GNOME System Monitor and go to the Resources tab
3. Launch any 3D application (e.g., Minecraft, Blender)
4. Observe that GPU usage remains 0% in System Monitor, while radeontop shows
significant load
Additional information:
glxinfo | grep "OpenGL renderer" output:
OpenGL renderer string: AMD CAICOS (DRM 2.51.0 / 7.0.0-15-generic)
DRI_PRIME=1 glxinfo | grep "OpenGL renderer" output:
OpenGL renderer string: AMD CAICOS (DRM 2.51.0 / 7.0.0-15-generic)
radeontop correctly shows GPU utilization, confirming the hardware
counters are working.
This bug report was prepared with AI assistance.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: gnome-system-monitor (not installed)
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sat May 9 21:35:20 2026
InstallationDate: Installed on 2026-05-08 (1 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
ProcEnviron:
LANG=zh_CN.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-system-monitor
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-system-monitor (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-system-monitor in Ubuntu.
https://bugs.launchpad.net/bugs/2152091
Title:
gnome-system-monitor: GPU usage always 0% for AMD Radeon HD 6470M
(CAICOS) using radeon driver
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https://bugs.launchpad.net/ubuntu/+source/gnome-system-monitor/+bug/2152091/+subscriptions
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