Re: GRUB not applying Intel Microcode?

[Greg Wooledge <wooledg@eeg.ccf.org>]

On Wed, Oct 23, 2019 at 10:16:00PM -0400, Christopher David Howie wrote:
> On 10/23/2019 9:16 PM, Kyle K wrote:
> > In my grub.cfg I don't see anything that resembles "initrd 
> > /intel-ucode.img /initrd.img-4.19.0-6-amd64".
> 
> On Debian, microcode updates are embedded in the main initrd, not put in
> a secondary initrd.
> 
> The /usr/share/initramfs-tools/hooks/intel_microcode script is
> responsible for adding the appropriate update files, scripts, and tools
> to the initrd.
> 
> > 1. Is microcode getting applied? 
> 
> If you have this package installed and have rebooted since the last
> microcode update, then almost certainly.

You can also verify the presence of the files in the initramfs image:

wooledg:~$ lsinitramfs /boot/initrd.img-4.19.0-6-amd64 | head
kernel
kernel/x86
kernel/x86/microcode
kernel/x86/microcode/.enuineIntel.align.0123456789abc
kernel/x86/microcode/GenuineIntel.bin
.
bin
conf
conf/arch.conf
conf/conf.d