Have you ever feel annoyed when booting into Darkmatter or any Android-x86 version that show a warning like :
[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x52 (or later)
It still boot, but you are feeling annoyed and also worry about what will happen. So I'll show you a simple fix for this
This can apply to every Android-x86 version including Darkmatter too (can be applied even on a linux distro). So no need to ask if other OS can be used.
First, download this early initrd contain all the Intel microcode (as 11/2019) :

MEGA
MEGA provides free cloud storage with convenient and powerful always-on privacy. Claim your free 20GB now
Then move it to the partition of your Android-x86 (or Darkmatter) partition
Finally, edit grub to include it in initrd load
For example :
search --set=root --file /findme
linux /kernel quiet root=/dev/ram0 androidboot.selinux=permissive acpi_sleep=s3_bios,s3_mode SRC=/
initrd /early_ucode.cpio /initrd.img
(Note that you have to apply it on every kernel in order to apply microcode)
Now reboot and test
Here is one of the example of an sucessfully applied microcode.
Before :
After :
(Or you notced that TSC_DEADLINE warning is disappeared)
Hope you guys will succeed. Good luck