Public bug reported:
What I expected to happen:
- The gnome-system-monitor doesn't allocate VRAM in the GPU. If it does, at
least it should be some reasonable amount.
What I observed instead:
- The gnome-system-monitor allocates VRAM in the GPU as soon as started, and
allocates more of it the larger its window is resized, going past 1 GB of VRAM.
Steps to reproduce:
- Open the gnome-system-monitor, keep its window as small as allowed.
- Check the amount of GPU VRAM the gnome-system-monitor is using with
nvidia-smi, it is 10 MB.
- Enlarge the gnome-system-monitor window, the amount of GPU VRAM it uses
increases.
- Maximize the gnome-system-monitor window, at 2560x1440 pixels size, it uses
more than 1200 MB of GPU VRAM.
- Reduce the gnome-system-monitor window size again, the amount of GPU VRAM it
uses very slowly decreases again; in a matter of minutes goes down to 18 MB.
Information about the setup follows.
⮕ lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04.2 LTS
Release: 24.04
⮕ uname -a
Linux hokuto 6.11.0-26-generic #26~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr
17 19:20:47 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
⮕ apt-cache policy gnome-system-monitor
gnome-system-monitor:
Installed: 46.0-1build1
Candidate: 46.0-1build1
Version table:
*** 46.0-1build1 500
500 http://it.archive.ubuntu.com/ubuntu noble/main amd64 Packages
100 /var/lib/dpkg/status
⮕ cat /proc/driver/nvidia/version
NVRM version: NVIDIA UNIX x86_64 Kernel Module 570.133.07 Fri Mar 14 13:12:07
UTC 2025
GCC version:
⮕ nvidia-smi --query-gpu=name --format=csv
name
NVIDIA GeForce RTX 4070
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gnome-system-monitor 46.0-1build1
ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11
Uname: Linux 6.11.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.28.1-0ubuntu3.7
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 22 20:31:27 2025
InstallationDate: Installed on 2025-06-20 (2 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
ProcEnviron:
LANG=en_US.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 noble
** Attachment added: "Screenshots with nvidia-smi output with small and large
gnome-system-monitor window respectively"
https://bugs.launchpad.net/bugs/2115159/+attachment/5885475/+files/sreenshot_bug.png
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https://bugs.launchpad.net/bugs/2115159
Title:
When the gnome-system-monitor window is enlarged, it uses an
unreasonable amount of GPU VRAM (1+ GB)
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