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There is a long time bug when the user press any function key or media
key om Gnome, the CPU spikes to 100%, the system freezes for some
seconds and then the key is pressed. This is particularly true when
change the screen brightness. This only happens in Xorg, Wayland is not
affected.
On Brazilian keyboard a workaround is to edit the file
`/usr/share/X11/xkb/symbols/br` and comment the line `modifier_map Mod3
{ Scroll_Lock };`
This has been affecting multiple users and has been discussed on
https://www.reddit.com/r/gnome/comments/84453o/delayfreezecpu_spike_when_using_the_functionmedia/
https://askubuntu.com/questions/1025302/media-keys-delayed-and-cause-a
-cpu-spike-to-100-on-ubuntu-17-10-with-gnome
https://askubuntu.com/questions/906723/fn-media-keys-slow-delayed-on-
ubuntu-gnome-17-04?noredirect=1&lq=1
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: Incomplete
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Delay/freeze/cpu spike when using the function/media/brightness keys in Xorg
https://bugs.launchpad.net/bugs/1825679
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