[CentOS] How to blacklist a device driver (sysemd)

Hi,

how can a specific device driver in CentOS 7 be blacklisted, so that it doesn't load at boot time? We have Infiniband adapters which are not completely supported by CentOS and we want to silence the error messages for the time being.

I tried with the files

/etc/modprobe.d/blacklist /etc/modprobe.d/blacklist.conf

and with entries

mlx5_core mlx5_ib

blacklist mlx5_core blacklist mlx5_ib

install mlx5_core /dev/null install mlx5_ib /dev/null

all found on different websites.

None of these entries helps. mlx5_core and mlx5_ib are still loaded and the system is flooded with error messages.

Cheers frank