Gnome-shell is taking a lot of ram

To disable an extension, first get a list with

gnome-extensions list

To list only enabled extensions, use

gnome-extensions list --enabled

To disable an enabled extension, use e.g.

gnome-extensions disable [email protected]

General methods to investigate issues with gnome shell:

  1. Disable all extensions and check if that solves it.
  2. If so enable 1 extension at a time and find the culprit.
  3. If you find a culprit visit the extensions page and file a bug report if there is not one filed yet.

If 1. is not the answer switch the video card driver to another and check if that fixes it.