Gnome Shell high CPU usage after hibernation

Wayland

Try this...

You may have a problem with an older computer, with an older GPU. Try this...

sudo -H gedit /etc/gdm3/custom.conf # edit this file

change:

#WaylandEnable=false

to:

WaylandEnable=false

Save the file and quit gedit. Then reboot.

Swap/hibernation

Your swap partition, or /swapfile, is excessive.

Edit your question with the outputs of these commands, use copy/paste, not a screenshot.

cat /etc/fstab

sudo blkid

cat /etc/initramfs-tools/conf.d/resume

grep -i "GRUB_" /etc/default/grub