Desktop blinks / flashes after unlocking the system ubuntu 18.04.4 (nvidia + amdgpu)

[Arun Kumar]

My ubuntu desktop gnome3 is started flashing after unlocking the machine, i tired lock and unlock twise still the problem remains.

OS: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic

System configuration

Processor: AMD Ryzen 7-3750H processor, 2.3GHz Base speed (6MB cache, up to 4.0 GHz)
Memory & Storage: 8GB DDR4 2400MHz RAM upgradeable upto 32GB RAM with| NVIDIA GeForce GTX 1650 GDDR5 4GB VRAM Graphics| Storage: 1TB 5400RPM 2.5' HDD + PCIe NVMe 256GB M.2 SSD

please help me to resolve this issue
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.11
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2020-03-01 (7 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
NonfreeKernelModules: nvidia_modeset nvidia
Package: gnome-shell 3.28.4-0ubuntu18.04.3
PackageArchitecture: amd64
Tags: bionic
Uname: Linux 5.5.8-050508-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True

[Daniel van Vugt (vanvugt)]

Please:

1. Run this command to send us more information:

   apport-collect 1865316

2. Take a video of the issue and attach it here.

[Arun Kumar (arunknmsb)]

apport information

[Arun Kumar (arunknmsb)]

apport information

[Arun Kumar (arunknmsb)]

apport information

[Arun Kumar (arunknmsb)]

apport information

[Daniel van Vugt (vanvugt)]

Please also run:

  lspci -k > lspcik.txt

and then attach the file 'lspcik.txt' here.

[Daniel van Vugt (vanvugt)]

And while the problem is happening run:

  journalctl -b0 > journal.txt

and attach the file 'journal.txt' here.

[Arun Kumar (arunknmsb)]

Attachment is here

[Arun Kumar (arunknmsb)]

Journal TXT

[Daniel van Vugt (vanvugt)]

Thanks.

This is probably a kernel or driver issue. Since you're using a non-Ubuntu kernel first please try downgrading to a supported Ubuntu kernel.

[Arun Kumar (arunknmsb)]

How do i do that?