Bug 514137

Created attachment 188205 [details]
GPU usage on i915 vs xe

SUMMARY
System Monitor is unable to display GPU usage for integrated Intel Arc GPU, if the kernel uses the xe kernel module instead of the i915 kernel module. Other tools (such as mangoHUD) are able to estimate the GPU usage even when using the xe kernel module.

STEPS TO REPRODUCE
1. Type `lspci -vvvnnd ::03xx | grep "Kernel driver"` to ensure the xe kernel driver is in use.
2. Open the System Monitor application.
3. Navigate to "History" and scroll down to "GPU".

OBSERVED RESULT
The charts display that 0% of the GPU is being utilized.

EXPECTED RESULT
The charts are supposed to display the usage of the GPU. This works if the i915 kernel module is in use, but NOT if the xe kernel module is in use.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.0
Kernel version: 6.18.3-arch1-1 (64 bit)

ADDITIONAL INFORMATION
Other tools such as mangohud are able to estimate GPU usage (https://github.com/flightlessmango/MangoHud#metrics-support-by-gpu-vendordriver) even on the integrated GPU, regardless of whether xe/i915 kernel module is being used.