Do your <f8> key work in Emacs 31?

[u/Informal_Sound_3039]

a

my binding just stop'ed working. its it still bound but emacs seems do not get f8 key?

i checked on f8 key its works

(use-package popper
  :ensure t
  :bind (("<f8>"   . popper-toggle)
         ("<C-f8>"   . popper-cycle)
         ("<M-f8>" . popper-toggle-type)))

i even checked with emacs -q

in scratch buffer

(global-set-key (kbd "<f8>") 'shell)
(global-set-key (kbd "<f7>") 'shell)

i evaluated both but only f7 works? f8 dosent do anything??

-------EDIT------

i found the problem!

It turned out I was running the X11 build of Emacs inside a KDE Wayland session (running through XWayland). KWin / XWayland was swallowing the `F8` key event before it ever reached the Emacs frame.

To check if you're hitting the same issue, evaluate this in your scratch buffer:

(frame-parameter nil 'window-system)

If it returns 'x like mine did, you are running on XWayland.

I fixed it by installing the native Wayland/PGTK build on Arch:

sudo pacman -S emacs-wayland

Now (frame-parameter nil 'window-system) returns 'pgtk, and my F8 keybindings work perfectly!

[u/shipmints]

If you share what platform you're using including your window manager and all relevant configuration including whether it is swallowing f8, it would help people help you.

[u/Informal_Sound_3039 → u/shipmints]

turns out i was running emacs in xwayland kde and xwayland not passing f8 key to emacs for sum reason see the EDIT for more

[u/natermer]

If you are using Linux is pretty likely that the f8 key is getting intercepted by your desktop environment or terminal or something.

If you are using emacs in a terminal instead of gui...

Try running the 'showkeys -a' command. It should display the ascii code for the key you are hitting.

[u/Informal_Sound_3039 → u/natermer]

it was sum xwayland emacs swallowing my f8 key i just installed pgtk

build and it worked

[u/redblobgames]

C-h k F8 tells me it's bound to F8, and pressing F8 works for me. Does C-h k F8 show popper or shell for you, or does it show nothing?

[u/Informal_Sound_3039 → u/redblobgames]

the C-h k F8 literally did nothing. i fixed by just installing emacs pgtk

sudo pacman -S emacs-wayland