** Summary changed:

- gnome-shell uses 44% cpu when simply moving windows
+ gnome-shell uses high CPU when simply moving windows
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https://bugs.launchpad.net/bugs/1799266

Title:
  gnome-shell uses high CPU when simply moving windows

Status in gjs package in Ubuntu:
  Fix Released
Status in gnome-shell package in Ubuntu:
  In Progress
Status in mutter package in Ubuntu:
  In Progress

Bug description:
  After doing a stock install Ubuntu 18.04.1 LTS on an imac 27" 2010 
  8G ram, Intel® Core™ i7 CPU 870 @ 2.93GHz × 8

  Simply moving a window around on the screen increases the cpu usage
  by gnome-shell to 44%. When displaying a movie, totem takes 10%, gnome-shell 
takes 22%.
  etc etc

  System:    Host: oldie Kernel: 4.15.0-36-generic x86_64 bits: 64 Desktop: 
Gnome 3.28.3
             Distro: Ubuntu 18.04.1 LTS
  Machine:   Device: desktop System: Apple product: iMac11 3 v: 1.0 serial: N/A
             Mobo: Apple model: Mac-F2238BAE v: iMac11 3 serial: N/A
             UEFI: Apple v: IM112.88Z.0057.B01.1112090906 date: 12/09/11
  CPU:       Quad core Intel Core i7 870 (-MT-MCP-) cache: 8192 KB
             clock speeds: max: 2927 MHz 1: 1271 MHz 2: 1206 MHz 3: 1374 MHz 4: 
1271 MHz 5: 1377 MHz 6: 1266 MHz
             7: 1693 MHz 8: 1279 MHz
  Graphics:  Card: Advanced Micro Devices [AMD/ATI] Broadway PRO [Mobility 
Radeon HD 5850]
             Display Server: x11 (X.Org 1.19.6 ) driver: radeon Resolution: 
2560x1440@59.95hz
             OpenGL: renderer: AMD JUNIPER (DRM 2.50.0 / 4.15.0-36-generic, 
LLVM 6.0.0) version: 3.3 Mesa 18.0.5
  Audio:     Card-1 Intel 5 Series/3400 Series High Definition Audio driver: 
snd_hda_intel
             Card-2 Advanced Micro Devices [AMD/ATI] Juniper HDMI Audio [Radeon 
HD 5700 Series]
             driver: snd_hda_intel
             Sound: Advanced Linux Sound Architecture v: k4.15.0-36-generic
  Network:   Card-1: Broadcom Limited NetXtreme BCM5764M Gigabit Ethernet PCIe 
driver: tg3
             IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: 
c4:2c:03:30:ce:8e
             Card-2: Qualcomm Atheros AR928X Wireless Network Adapter 
(PCI-Express) driver: ath9k
             IF: wls1 state: down mac: d8:30:62:67:2a:19
  Drives:    HDD Total Size: 2500.5GB (38.0% used)
             ID-1: /dev/sda model: WDC_WD1001FALS size: 1000.2GB
             ID-2: USB /dev/sdb model: MK1059GSM size: 1000.2GB
             ID-3: USB /dev/sdd model: Elements_10B8 size: 500.1GB
  Partition: ID-1: / size: 226G used: 125G (58%) fs: ext4 dev: /dev/sda2
             ID-2: /home size: 701G used: 876M (1%) fs: btrfs dev: /dev/sda4
  RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
  Sensors:   System Temperatures: cpu: 56.0C mobo: N/A
             Fan Speeds (in rpm): cpu: 936
  Info:      Processes: 342 Uptime: 3:07 Memory: 2087.3/7967.4MB Client: Shell 
(bash) inxi: 2.3.56

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.3-0ubuntu0.18.04.2
  ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
  Uname: Linux 4.15.0-36-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Oct 22 19:09:59 2018
  DisplayManager: gdm3
  GsettingsChanges:
   b'org.gnome.shell' b'disable-user-extensions' b'true'
   b'org.gnome.shell' b'app-picker-view' b'uint32 1'
   b'org.gnome.shell' b'favorite-apps' redacted by apport
   b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
  InstallationDate: Installed on 2018-10-22 (0 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=sv_SE.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

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