Bug 499373

Summary:	Spectacle wakes up the dGPU and keeps it powered on if nvidia-vaapi-driver is installed
Product:	[Applications] Spectacle	Reporter:	Valeri <v19930312>
Component:	General	Assignee:	Noah Davis <noahadvs>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kde
Priority:	NOR
Version First Reported In:	24.12.1
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Valeri 2025-02-01 00:22:19 UTC

SUMMARY
On an AMD iGPU + Nvidia dGPU setup Spectacle will power on the dGPU when it's launched and will keep it active while open if and only if nvidia-vaapi-driver (libva-nvidia-driver on arch) is installed. This results in increased start time and power draw.

STEPS TO REPRODUCE
1. Install nvidia-vaapi-driver
2. Launch spectacle

OBSERVED RESULT
dGPU will get powered up and stay that way until spectacle is closed. Spectacle will also launch slower than it does without nvidia-vaapi-driver.

EXPECTED RESULT
dGPU will stay powered down or at least will power down soon after spectacle starts.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.1

ADDITIONAL INFORMATION
Frustratingly, neither nvtop nor nvidia-smi show spectacle as using the dGPU, making it relatively hard to understand why is it staying powered up.

Comment 1 Noah Davis 2025-02-01 03:16:00 UTC

Seems like https://bugs.kde.org/show_bug.cgi?id=476866

*** This bug has been marked as a duplicate of bug 476866 ***