This script is for Slackware 13.0 only and may be outdated.

SlackBuilds Repository

13.0 > System > microcode_ctl (1.17)

Intel Microcode Update Utility for Linux

The microcode_ctl utility is a companion to the IA32 microcode driver written
by Tigran Aivazian <>. The utility has two uses:

* It decodes and sends new microcode to the kernel driver to be uploaded
to Intel IA32 processors. (Pentium Pro, PII, PIII, Pentium 4, Celeron,
Xeon etc - all P6 and above, which does NOT include pentium classics).
It also supports processors of the x86_64 architecture.
* It signals the kernel driver to release any buffers it may hold.

The microcode update is volatile and needs to be uploaded on each system
boot i.e. it doesn't reflash your cpu permanently, reboot and it reverts
back to the old microcode.

To use this utility you need to compile the kernel driver (found under
"Processor type and features"). The microcode itself can be found at and should be placed under

To have the microcode updated each time at boot, start the included
init script in rc.local:

if [ -e "/etc/rc.d/rc.microcode_ctl" ];
/etc/rc.d/rc.microcode_ctl start

Maintained by: Andrzej Telszewski
Keywords: microcode
ChangeLog: microcode_ctl


Source Downloads:
microcode_ctl-1.17.tar.gz (98a7f06acef8459c8ef2a1b0fb86a99e)

Download SlackBuild:
microcode_ctl.tar.gz.asc (FAQ)

(the SlackBuild does not include the source)

Validated for Slackware 13.0

See our HOWTO for instructions on how to use the contents of this repository.

Access to the repository is available via:
ftp git cgit http rsync

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