Public bug reported:
I needed to set `GSK_RENDERER=gl` in `/etc/environment` to reduce the
latency when launching GTK4 apps for the first time. Otherwise, the dGPU
is woken up which takes around 1-3 seconds for the app to launch.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: gnome-session (not installed)
ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
Uname: Linux 6.17.0-5-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 8 10:12:44 2025
InstallationDate: Installed on 2025-09-27 (10 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-session
UpgradeStatus: Upgraded to questing on 2025-10-07 (1 days ago)
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing wayland-session
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https://bugs.launchpad.net/bugs/2127046
Title:
GSK_RENDERER=vulkan wakes dGPU up on first app launch.
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