[Bug 1803960] Re: 4.18.0 kernels hang system randomly

I almost forgot about this; 4.17.19-041719-lowlatency has been running
fine now for 16 days. I'm going to switch to 4.18.0-13-lowlatency and
confirm the problem still exists.

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https://bugs.launchpad.net/bugs/1803960

Title:
4.18.0 kernels hang system randomly

Status in linux package in Ubuntu:
Triaged
Status in linux source package in Cosmic:
Triaged

Bug description:
I've been using 18.04 on an Asus T300CHI without issue until I decided
to switch to the v4.18 kernels from 18.10 via linux-image-lowlatency-
hwe-18.04-edge.

Since then the system randomly but regularly completely hangs. Only a
hard power-off resolves it.

Frustratingly there are never any clues in the kernel logs so it is
very difficult to point to anything that might cause it; there is
never any obvious pattern in the workload, the user interaction, or
state of the PC when the hang occurs.

A week ago I switched to the Ubuntu mainline v4.19 builds and that
resolved the issue.

I was reminded of it again today when it hung a few minutes ago. After
the reboot I checked the previous boot log and realised the PC had
accidentally been booted with the default v4.18 kernel rather than
v4.19.

I don't think this report can be debugged but it is worth having a
tracking bug in case other people experience the same issue with
v4.18.

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