On 2018-02-05 08:02, Pascal Obry wrote: > First, unload is not possible as nvidia is in use.
in that case you could either stop X and work in the console ... or just do the following steps, since obviously only the nvidia-uvm module in interesting here, there is no need for rebooting: $ sudo modprobe -r nvidia_uvm # unload $ lsmod | grep nvidia_uvm # expect empty result $ nvidia-modprobe -u ; echo $? # load it; print return code $ lsmod | grep nvidia_uvm # expect non-empty result $ sudo nvidia-modprobe -u # if previous load didn't # succeed, retry as root $ lsmod | grep nvidia_uvm # now it must be loaded Are there any hardening settings enabled on your system that could prevent this setuid executable from doing its job? * filesystems mounted with option nosuid * apparmor * selinux ... BTW, which version of the nvidia-modprobe package do you have installed? Andreas