Howto: Prevent a Linux kernel module from auto loading

Posted on in Categories CentOS, Debian Linux, Howto, Linux, RedHat/Fedora Linux, Sys admin, Tip of the day, Troubleshooting last updated June 13, 2007

In some situation you may want to avoid loading a Linux driver module automatically . For example:
[a] You would like to use proprietary device driver (I’m against any sort of proprietary drivers) and not inbuilt (reverse engineer) kernel driver.

[b] If your server system connected without a diskette / floppy drive; kernel will try to load floppy driver – disable floppy driver or module.

[c] In some cases buggy driver causes kernel BUG on load so you just want to avoid the problem.

The Linux kernel get module information from /etc/modprobe.conf file and /etc/modprobe.d/* file(s).

If you are using CentOS/Redhat/RHEL/Fedora Linux…

Just open your /etc/modprobe.conf file and turn of auto loading using following syntax:
alias driver-name off

If you are using Debian / Ubuntu Linux…

open /etc/modprobe.d/blacklist file and add drivername using following syntax:
blacklist driver-name

Reboot your box and use lsmod command to show the status of modules in the Linux Kernel.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

12 comment

  1. You need to add following drivers

    lsmod and modinfo command always gives information about loaded drivers.

  2. the method is if nothing works in debian based distros to blacklist a certain module,try making a file /etc/modprobe.d/00local with content as
    install modulename /bin/true

  3. I am unable to stop kvm, kvm_intel from getting loaded even after adding those to blacklist (Ubuntu 9.10).

  4. OpenSuse 11.4 can only mount one type of filesystem ‘ISO9660’ . What is my problem?
    Thank you

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