Dears,

there is thread https://github.com/intel/gvt-linux/issues/162 discussing issues when gvt-g is used in Windows guest while the host has prime render offload enabled.

I have this issue as well and I did a kernel bisect between v5.7 (works kind of OK, at least there are no qemu/guest crashes) and v5.8 and the bisect landed on the commit 327d5b2fee91c404a3956c324193892cf2cc9528.

Thanks for your help.

Anton Gubarkov.