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Ptyxis uses the dedicated graphics card on my Dell XPS 15 9530, instead
of the integrated graphics card, which drains the battery very fast (25W
instead of 5W).
This looks like a bug because from the Ubuntu Dock, right-clicking the
icon for Ptyxis shows a "Launch using dedicated Graphics Card", meaning
Gnome assumes it will use the integrated graphics card by default.
This is confirmed by nvidia-smi output:
Sun Apr 26 10:57:37 2026
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 595.58.03 Driver Version: 595.58.03 CUDA
Version: 13.2 |
+-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile
Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util
Compute M. |
| | |
MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA GeForce RTX 4070 ... Off | 00000000:01:00.0 Off |
N/A |
| N/A 49C P3 12W / 40W | 91MiB / 8188MiB | 14%
Default |
| | |
N/A |
+-----------------------------------------+------------------------+----------------------+
+-----------------------------------------------------------------------------------------+
| Processes:
|
| GPU GI CI PID Type Process name
GPU Memory |
| ID ID
Usage |
|=========================================================================================|
| 0 N/A N/A 6126 G /usr/bin/gnome-shell
2MiB |
| 0 N/A N/A 21706 C+G /usr/bin/ptyxis
56MiB |
+-----------------------------------------------------------------------------------------+
FWIW kgx (Gnome Console) seems to have the same issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: ptyxis 50.1-1ubuntu2
ProcVersionSignature: Ubuntu 6.17.0-22.22-generic 6.17.13
Uname: Linux 6.17.0-22-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 26 11:14:39 2026
InstallationDate: Installed on 2023-11-21 (887 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: ptyxis
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gtk4 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
--
GTK4 apps use dedicated Nvidia graphics card
https://bugs.launchpad.net/bugs/2150358
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