Bug#1128843: nvidia-driver: WARNING at nv_drm_revoke_modeset_permission (nvidia-drm-drv.c:1226)

[Fernando]

It seems that you use the proprietary flavor 
(https://wiki.debian.org/NvidiaGraphicsDrivers#Current_driver_types) of 
the Nvidia driver. I believe that you cannot change to the open flavor 
of Nvidia's drivers because your Nvidia MX130 is too old for it, but in 
my case the warning stopped after making the change. To change from 
nvidia-kernel-dkms (proprietary flavor) to nvidia-open-kernel-dkms (open 
favor) I did the following:
apt purge --auto-remove '*nvidia*' '*nvidia*:i386' '*cuda*' '*cuda*:i386'
apt install nvidia-open-kernel-dkms nvidia-driver
The first purge may be overkill, but it worked for me.