https://bugs.kde.org/show_bug.cgi?id=501139
Bug ID: 501139
Summary: multigpu offloading doesn't work when nvidia is the
primary display aka reverse prime
Classification: Plasma
Product: kwin
Version: 6.3.2
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: luanv.olive...@outlook.com
Target Milestone: ---
Created attachment 179175
--> https://bugs.kde.org/attachment.cgi?id=179175&action=edit
backtrace vkcube xcb
SUMMARY
when the display is connected to a nvidia gpu on a desktop, running vkcube
--wsi wayland --gpu_number 1 should run in the igpu, but instead i get an error
message:
[destroyed object]: error 7: importing the supplied dmabufs failed
STEPS TO REPRODUCE
1. connect the display to an nvidia gpu with proprietary drivers
2. run vkcube --wsi wayland --gpu_number 1 or vkcube --wsi xcb --gpu_number 1
OBSERVED RESULT
error (wayland) or crash (xcb)
EXPECTED RESULT
vkcube runs on the igpu with no issues ie reverse_prime works
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 41
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.5-200.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 9800X3D 8-Core Processor
Memory: 30.5 GiB of RAM
Graphics Processor 1: NVIDIA GeForce RTX 4070 Ti SUPER
Graphics Processor 2: AMD Radeon Graphics
ADDITIONAL INFORMATION
nvidia-570.124.04-1.fc41.x86_64
vulkan-tools-1.4.304.0-1.fc41.x86_64
mesa-dri-drivers-25.0.0-2.fc41.x86_64
desktop 4070 ti super
1 display connected to nvidia gpu
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