[Bug 1803942] Re: System randomly hangs during suspend when mei_wdt is loaded

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verification-needed-bionic' to 'verification-failed-
bionic'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

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** Tags added: verification-needed-bionic

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https://bugs.launchpad.net/bugs/1803942

Title:
System randomly hangs during suspend when mei_wdt is loaded

Status in HWE Next:
New
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Bionic:
Fix Committed

Bug description:
Problem description:
System randomly hangs during suspend when mei_wdt is loaded.

Platform:
Intel Dawson Canyon I5 (NUC7i5DNHE) and I7 (NUC7i7DNHE)

Test procedure:
1. Install Ubuntu 18.04 and do apt full-upgrade

2. Enable mei_wdt:
$ sudo modprobe mei_wdt

3. Do system S3 test:
$ sudo systemctl suspend
or
$ sudo rtcwake -v -m mem -s 15

4. Afterward, I noticed that somehow system will hang during
suspend/resume.

Expect result:
Suspend/resume won't impact system.

Actual result:
System will hang during S3 test.

Additional info:
- BIOS version: V57
- Another i3 platform (NUC7i3DNHNC) doesn't have this issue.

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