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Message #08787
[Bug 2127046] Re: GSK_RENDERER=vulkan wakes dGPU up on first app launch.
Unfortunately there are multiple issues.
Those GTK apps crashing with signal 5 appear to be related to GSettings
schemas being out of date, preventing the app from launching. That's
caused by a broken system upgrade so check that your upgrade to 25.10 is
really complete with nothing left to resolve:
sudo apt update
sudo apt full-upgrade
Separately, one of those crash reports mentions that the Nvidia kernel
and user drivers have different versions:
kernel: NVRM: API mismatch: the client 'ptyxis' (pid 72780)
NVRM: has the version 580.82.07, but this kernel module has
NVRM: the version 580.65.06. Please make sure that this
NVRM: kernel module and all NVIDIA driver components
NVRM: have the same version.
That is also an upgrade problem (which might explain the performance
issue). To resolve it I would do:
sudo apt update
sudo apt install linux-modules-nvidia-580-generic-hwe-24.04
sudo apt full-upgrade
--
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to gtk4 in Ubuntu.
https://bugs.launchpad.net/bugs/2127046
Title:
GSK_RENDERER=vulkan wakes dGPU up on first app launch.
Status in gtk4 package in Ubuntu:
New
Bug description:
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)
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References