Thank you for giving a hint to the out-of-date firmware and its
implications.
I wanted to update my firmware using fwupdmgr and the firmware binary
files provided by Lenovo. Unfortunately the firmware can only be flashed
when the system boots via UEFI, but my computer won't boot in UEFI mode,
For the record: systems with firmware outdated enough to actually hit
this microcode update issue *most likely* have several other critical
security issues in their Intel platform, not just in the processor.
The outdated firmware not only blocks you from updating the processor
microcode (thus
I can confirm that downgrading intel-microcode to version
"3.20191115.1ubuntu3" resolves the issue. I've marked the package as "on
hold" for now.
Here's my "lscpu" output that I forgot in my initial report:
Architecture:x86_64
CPU op-mode(s): 32-bit, 64-bit
I have the same issue on my asus UX303UB.
I downgraded intel-microcode to version "3.20191115.1ubuntu3" in order
to boot my PC.
Here is the output of the command "lscpu" on my PC :
Architecture:x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order:
