Created attachment 174824 [details] Example of moving a screen creating jerky movement and high usage on Nvidia GPU Summary: There is noticeable performance degradation when using an external monitor connected via the Nvidia HDMI output on hibrid configuration AMD + Nvidia laptops . The GPU usage spikes to 100% when moving windows on the external monitor and moving windows around. This issue did not occur before upgrading to KDE Plasma 6.2. Steps to Reproduce: Connect an external monitor to the Nvidia HDMI output. Move windows around on the external monitor. Observe GPU usage and performance when moving windows. Expected Results: Smooth performance without excessive GPU usage. Actual Results: GPU usage reaches 100% (as observed via Btop++) when moving windows, causing sluggish performance and jerky movement. The issue is specific to the Nvidia HDMI output. When using the AMD integrated graphics to connect the monitor, performance is smooth and the GPU use remains minimum. This performance degradation did not occur prior to KDE Plasma 6.2. System Info: Operating System: Fedora Linux 40 KDE Plasma Version: 6.2.0 KDE Frameworks Version: 6.7.0 Qt Version: 6.7.2 Kernel Version: 6.11.3-350.vanilla.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 7840HS w/ Radeon 780M Graphics Memory: 30.6 GiB of RAM Graphics Processor: AMD Radeon 780M + Nvidia HDMI Output Laptop Model: Victus by HP Gaming Laptop Could be related to the issue #494407 as affects the same system configuration.
Additional information: This seems to be Wayland related, as there are no performance issues on an X11session.
SUMMARY: After updating to Plasma 6.2 in Garuda Linux moving windows became slow, jerky and created high discrete GPU usage ( STEPS TO REPRODUCE: 1. Have an external Monitor (connected via USB-C Display Port) 2. Login to Wayland Plasma desktop session. OBSERVED RESULT: - Window movement slow and jerky on external monitor with discrete Nvidia GPU usage 50-80%. - On inbuilt monitor very smooth with discrete Nvidia GPU usage of 15-50%. EXPECTED RESULT: -See second point under Observed Result. SYSTEM INFO: Operating System: Garuda Linux KDE Plasma Version: 6.2.0 KDE Frameworks Version: 6.6.0 Qt Version: 6.7.3 Kernel Version: 6.11.3-zen1-1-zen (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics Memory: 15.0 GiB of RAM Graphics Processor: AMD Radeon Graphics (with Nvidia 3060 M discrete) Manufacturer: ASUSTeK COMPUTER INC. Product Name: ASUS TUF Gaming A15 FA506QM_TUF506QM System Version: 1.0 ADDITIONAL INFO: Added this to show it's not just HDMI but also Display Port (usb-c) monitor connections affected.
Seems to be fixed on the 6.2.1