I sent my computer to the manufacturer for diagnosis and help for a video output issue it was having. They updated the BIOS. Since then I've been getting
[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x20 (or later)
I didn't have any microcode or ucode packages installed before and I didn't used to get this message.
I've contacted the manufacturer and they've responded "don't remember your ticket number but doubt we updated the BIOS", so they're not being very helpful.
It boots and works, but is TSC_DEADLINE important or useful?
The only thing I can find about it is this: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=73b866d89bf7c9a895d5445faad03fa3d56c8af8
But that seems to only apply to VirtualBox, and in any case I'm already running kernel 4.14 so I would think if that commit were going to fix my issue it already would have.
ryan@pocketwee:~$ uname -a Linux pocketwee 4.14.0-1-amd64 #1 SMP Debian 4.14.2-1 (2017-11-30) x86_64 GNU/Linux