Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: gnome-shell (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1764137

Title:
  [bionic][beta][nvidia] gnome-shell high cpu utilization

Status in gnome-shell package in Ubuntu:
  Confirmed

Bug description:
  I am experiencing 60% - 200% CPU utilization after an upgrade from
  ubuntu artful to bionic.

  Pretty much any drawing results in a sluggish behavior due to high CPU
  utilization.

  The same combination of kernel/drivers did not result in the issue on
  17.10 so gnome-shell seems a good candidate to blame.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.0-0ubuntu5
  Uname: Linux 4.16.0-041600-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 15 16:53:34 2018
  DisplayManager: gdm3
  InstallationDate: Installed on 2017-02-27 (412 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20170227)
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to bionic on 2018-04-15 (0 days ago)
  ---
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2017-02-27 (412 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20170227)
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  Package: linux-image-4.16.0-041600-generic 4.16.0-041600.201804012230 
[origin: unknown]
  PackageArchitecture: amd64
  Tags: third-party-packages bionic
  Uname: Linux 4.16.0-041600-generic x86_64
  UnreportableReason: This is not an official Ubuntu package. Please remove any 
third party package and try again.
  UpgradeStatus: Upgraded to bionic on 2018-04-15 (0 days ago)
  UserGroups: adm cdrom dip libvirt lpadmin lxd plugdev sambashare sudo 
systemd-journal ubridge
  _MarkForUpload: True

  ➜  ~ dpkg -l | grep -P 'ii.*?nvidia'
  ii  nvidia-390                                                  
390.48-0ubuntu0~gpu17.10.2                                         amd64        
NVIDIA binary driver - version 390.48
  ii  nvidia-opencl-icd-390                                       
390.48-0ubuntu0~gpu17.10.2                                         amd64        
NVIDIA OpenCL ICD
  ii  nvidia-prime                                                0.8.7         
                                                     all          Tools to 
enable NVIDIA's Prime
  ii  nvidia-settings                                             
396.18-0ubuntu0~gpu17.10.1                                         amd64        
Tool for configuring the NVIDIA graphics driver

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