monitor continuously goes on/off when energy saver is active

[abcd]

Hi,
When monitor should power off (because of power saver timeout), he continuously wake on/off:
- screen became black
- monitor power off as no signal
- after a second he wake on again
- repeat

I know that could be hard to imagine the situation, so i attached a video.

I assume that software/hardware info are already included (as i used ubuntu-bug), but if not tell me.

Thanks for all your work :)

PS
sorry if bug report is wrong (that's the first time)

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-19-generic 5.3.0-19.20
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: marco 962 F.... pulseaudio
 /dev/snd/controlC2: marco 962 F.... pulseaudio
 /dev/snd/controlC1: marco 962 F.... pulseaudio
CurrentDesktop: KDE
Date: Mon Nov 4 19:12:28 2019
InstallationDate: Installed on 2019-11-03 (0 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
IwConfig:
 eno1 no wireless extensions.

 lo no wireless extensions.
MachineType: Packard Bell imedia S3840
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-19-generic root=UUID=f81de2b9-ff5a-4f92-af94-ac09f37653f4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-19-generic N/A
 linux-backports-modules-5.3.0-19-generic N/A
 linux-firmware 1.183.1
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/08/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P01-B1
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: imedia S3840
dmi.board.vendor: Packard Bell
dmi.chassis.type: 3
dmi.chassis.vendor: Packard Bell
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP01-B1:bd07/08/2011:svnPackardBell:pnimediaS3840:pvrP01-B1:rvnPackardBell:rnimediaS3840:rvr:cvnPackardBell:ct3:cvr:
dmi.product.family: Packard Bell Desktop
dmi.product.name: imedia S3840
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: P01-B1
dmi.sys.vendor: Packard Bell

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

I do see this issue on my RX480.