Issue:
Using Intel Flex 170/140 cards partitioned via SR-IOV using the xe driver on a Linux host with QEMU/KVM causes graphical issues in Windows guests if a guest driver newer than 5768 is used. The issues appear on the Windows Taskbar, Start Menu, and on some parts of the File Explorer.
I also took screenshots from inside the VM to rule out SPICE/display virtualization driver, and they also contain the issue, so it's very likely a rendering issue.
Further testing:
To test more drivers, I also forced the installation of the normal (non flex) arc windows driver on the flex card and could verify that 5768 is the last driver without the issue and 5971 and beyond have it.
I also took a screenshot in the VM to rule out Spice/display virtualization drivers, and it also contains the issues, so it's likely a rendering issue.
All tested applications render fine (FurMark, Unigine Heaven, Blender, ImarisViewer, napari, Edge...)
Setup:
- Intel Flex 170/140
- Kernel on Host from https://gitlab.freedesktop.org/drm/tip (so it contains the newest xe driver to enable sr-iov for the flex card)
- QEMU/KVM
- Display-Virtualization-for-Windows-OS (https://github.com/intel/Display-Virtualization-for-Windows-OS)
- Windows Guest Driver 32.0.101.6881 (https://www.intel.de/content/www/de/de/download/780185/intel-data-center-gpu-flex-series-windows.html)
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