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[Bug 2127046] Re: GSK_RENDERER=vulkan wakes dGPU up on first app launch.

 

# System Details Report
---

## Report details
- **Date generated:**                              2025-10-08 10:20:46

## Hardware Information:
- **Hardware Model:**                              Dell Inc. Dell G15 5520
- **Memory:**                                      16.0 GiB
- **Processor:**                                   12th Gen Intel® Core™ i7-12700H × 20
- **Graphics:**                                    Intel® Iris® Xe Graphics (ADL GT2)
- **Graphics 1:**                                  NVIDIA GeForce RTX™ 3050 Ti Laptop GPU
- **Disk Capacity:**                               512.1 GB

## Software Information:
- **Firmware Version:**                            1.35.0
- **OS Name:**                                     Ubuntu 25.10
- **OS Build:**                                    (null)
- **OS Type:**                                     64-bit
- **GNOME Version:**                               49
- **Windowing System:**                            Wayland
- **Kernel Version:**                              Linux 6.17.0-5-generic


** Package changed: gnome-session (Ubuntu) => ubuntu

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to gnome-session in Ubuntu.
https://bugs.launchpad.net/bugs/2127046

Title:
  GSK_RENDERER=vulkan wakes dGPU up on first app launch.

Status 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