This workaround do not work for GNU/Linux:


"
Alternatively, you can avoid the visual effect of Emacs changing its frame size entirely in your init file (i.e., without using the Registry), like this:

(setq frame-resize-pixelwise t)
(set-frame-position nil 0 0)
(set-frame-size nil (display-pixel-width) (display-pixel-height) t)
" - https://www.gnu.org/software/emacs/manual/html_node/efaq/Fullscreen-mode-on-MS_002dWindows.html (https://www.gnu.org/software/emacs/manual/html_mono/efaq.html#Fullscreen-mode-on-MS_002dWindows)


In GNU/Linux it has no effect, so you will encounter the slightly distracting visual effect of Emacs with this set instead:
(add-hook 'emacs-startup-hook 'toggle-frame-maximized)