$ xrandr --setprovideroffloadsink nouveau Intel

$ LIBGL_DEBUG=verbose DRI_PRIME=1 glxinfo | grep "OpenGL vendor string"
libGL: OpenDriver: trying /usr/lib64/dri/tls/nouveau_dri.so
libGL: OpenDriver: trying /usr/lib64/dri/nouveau_dri.so
libGL: driver does not expose __driDriverGetExtensions_nouveau(): /usr/lib64/dri/nouveau_dri.so: undefined symbol: __driDriverGetExtensions_nouveau
libGL error: failed to create dri screen
libGL error: failed to load driver: nouveau
libGL: OpenDriver: trying /usr/lib64/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib64/dri/swrast_dri.so
libGL: driver does not expose __driDriverGetExtensions_swrast(): /usr/lib64/dri/swrast_dri.so: undefined symbol: __driDriverGetExtensions_swrast
libGL: Can't open configuration file /home/nirbheek/.drirc: No such file or directory.
libGL: Can't open configuration file /home/nirbheek/.drirc: No such file or directory.
OpenGL vendor string: VMware, Inc.