Comment 27 for bug 1783140

4.15.0-33-generic Failed,
4.4.0-134-generic we know works.
I tested 4.13.0-46-generic and it worked (as expected after the positive 17.10 report in comment #23)

checking different builds from there
Bionic builds (so even the 4.13.0-32.35 being "before" the tested -46 it is the Bionic build of it)
4.13.0-32.35 - the last 4.13 - working
4.14.0-16.19 - the last 4.14 - failing
4.15.0-9.10 - early 4.15 - failing

Note good as well as bad cases were the same guest (Bionic).
Just installing different kernels in that guest, rebooting into these kernels and then triggering the migration.

4.14.0-11.13 - early 4.14 - failing

So it seems 4.13->4.14 is the breaking point, I'll check if I can get a git bisect inside this working ...