i tried the same steps given in this 2 websites
https://docs.fedoraproject.org/en-US...ocs/bumblebee/
https://copr.fedorainfracloud.org/co...ong/bumblebee/

when i try run the program i get

[root@localhost Desktop]# optirun glxspheres64
[ 903.802516] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) NOUVEAU(0): [drm] failed to set drm interface version.

[ 903.802642] [ERROR]Aborting because fallback start is disabled.

can anyone help me to solve this error.