kdump-config status - not ready to kdump with v4.18 kernel

As part of the makedumpfile autopkgtest, a test is done to make sure one can dump the kernel.
The test executes

$ kdump-config status

and expects to find that it is ready to kdump, however it is not.

The check fails at:
$ cat /sys/kernel/kexec_crash_loaded

Previously it was 1, but now it is 0.

Is this intentional? Do we need to change something in makedumpfile? Or is something missing in the kernel?

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-7-generic 4.18.0-7.8
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: xnox 9240 F.... pulseaudio
 /dev/snd/controlC1: xnox 9240 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 3 17:07:41 2018
HibernationDevice: RESUME=UUID=2bf263f1-753f-4b2e-92a6-b00381515e0c
InstallationDate: Installed on 2012-01-12 (2425 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130318)
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-7-generic root=UUID=6669d411-80c3-41cc-a629-ad84e1ee6854 ro splash crashkernel=384M-:128M crashkernel=384M-2G:128M,2G-:256M crashkernel=384M-2G:128M,2G-:256M crashkernel=384M-:128M vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-7-generic N/A
 linux-backports-modules-4.18.0-7-generic N/A
 linux-firmware 1.175
RfKill:

SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-06-25 (69 days ago)
dmi.bios.date: 08/13/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F18g
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z77X-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF18g:bd08/13/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77X-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.