https://bugs.kde.org/show_bug.cgi?id=473983
Bug ID: 473983
Summary: Setting NVIDIA PRIME OFFLOAD in startup script causes
black screen
Classification: Plasma
Product: kwin
Version: 5.27.7
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: vishalsubraman...@outlook.com
Target Milestone: ---
SUMMARY
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***
STEPS TO REPRODUCE
1. Set up the following environment variables in a KWin startup script
export __NV_PRIME_RENDER_OFFLOAD=1
export __VK_LAYER_NV_optimus=NVIDIA_only
export __GLX_VENDOR_LIBRARY_NAME=nvidia
2. Start plasma on wayland
What was my objective in doing this? I have an Optimus setup with NVIDIA and
Intel graphics. On Wayland, I wanted to use NVIDIA as primary GPU. There was no
option for doing this. Instead, the prime-run script is the only option for
launching individual programs on the GPU. The script essentially sets the above
variables before starting a program. So I thought I could do the same in a KWin
script, so that anything spawned after that uses the NVIDIA GPU for offloading.
OBSERVED RESULT
Black screen with a mouse cursor appears. Can open applications using keyboard
shortcuts (for example, Konsole using Ctrl+Alt+T), and can start other
applications from Konsole. Application windows are visible, but everything else
is black.
EXPECTED RESULT
A functioning desktop with all the panels, wallpapers, etc.
Operating System: Arch Linux
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Kernel Version: 6.4.12-arch1-1 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
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