secureboot: Secure boot could not be determined (mode 0)

Hello,

dmesg:
[ 0.000000] secureboot: Secure boot could not be determined (mode 0)

Best regards,
--
Cristian Aravena Romero (caravena)

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-4.19.0-8-generic 4.19.0-8.9
ProcVersionSignature: Ubuntu 4.19.0-8.9-generic 4.19.6
Uname: Linux 4.19.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu14
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: caravena 2769 F.... pulseaudio
 /dev/snd/pcmC0D0p: caravena 2769 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 7 12:58:49 2018
HibernationDevice: RESUME=UUID=efcf081f-0bb0-4907-b78c-1299aa4aee57
InstallationDate: Installed on 2018-12-02 (4 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: HP HP Pavilion x360 Convertible 14-cd0xxx
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.19.0-8-generic root=UUID=28bdadba-133c-4f5b-a5c9-b06993ea7ce2 ro rootflags=subvol=@ quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.19.0-8-generic N/A
 linux-backports-modules-4.19.0-8-generic N/A
 linux-firmware 1.176
SourcePackage: linux
UpgradeStatus: Upgraded to disco on 2018-12-02 (4 days ago)
dmi.bios.date: 06/14/2018
dmi.bios.vendor: Insyde
dmi.bios.version: F.13
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 8486
dmi.board.vendor: HP
dmi.board.version: 72.19
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.13:bd06/14/2018:svnHP:pnHPPavilionx360Convertible14-cd0xxx:pvrType1ProductConfigId:rvnHP:rn8486:rvr72.19:cvnHP:ct31:cvrChassisVersion:
dmi.product.family: 103C_5335KV HP Pavilion
dmi.product.name: HP Pavilion x360 Convertible 14-cd0xxx
dmi.product.sku: 3PX63LA#ABM
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP