Bug 200715

Summary:	Kernel panic at boot.
Product:	Platform Specific/Hardware	Reporter:	Sergij (workparttime251)
Component:	x86-64	Assignee:	platform_x86_64 (platform_x86_64)
Status:	RESOLVED INVALID
Severity:	normal	CC:	kai.heng.feng
Priority:	P1
Hardware:	Intel
OS:	Linux
URL:	https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783358
Kernel Version:	4.14, 4.15, 4.18	Subsystem:
Regression:	No	Bisected commit-id:

Description Sergij 2018-08-02 18:41:57 UTC

My distributive is xubuntu 16.04.

After update to the 4.15.x kernel my system cannot boot. It freezes after grub menu. I tried to boot recovery mode and saw kernel panic. Now my system can boot only on 4.13.x kernel.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783358

The bug exists in upstream (tested v4.18-rc6 and v4.18-rc5).

Kernel bisection was done.
The bad commit is:
[7744ccdbc16f0ac4adae21b3678af93775b3a386] x86/mm: Add Secure Memory Encryption (SME) support.

Comment 1 Sergij 2018-08-10 00:22:51 UTC

I'm sorry. I did not searching for BIOS updates well.
This solution work for me too.
https://bugzilla.redhat.com/show_bug.cgi?id=1520265