Re: vterm and Meta?

[hw]

On Wed, 2023-08-02 at 07:54 +0000, Thibaut Verron wrote:
> > With -Q ... with -q, it says "x is undefined" in the message buffer.
> That is... extremely strange.

What do you expect to happen?

> What about C-h k x ?

emacs -Q: x runs the command self-insert-command
emacs -q: x is undefined

> What is your operating system, emacs version, etc?

Fedora Workstation 38


# emacs --version
GNU Emacs 30.0.50
Development version 19777b7c864f on master branch; build date 2023-07-30.


I compiled it the other day following [1] because I wanted a version
that works with wayland.  So far, it works fine :)


[1]: 
https://github.com/NapoleonWils0n/cerberus/blob/master/fedora/emacs-build-fedora.org

> Does the alt key on your keyboard work in other programs?

Yes, when I look at the display of the keyobard layout in gnome that
you can display through Settings, it shows the Alt key pressed.

Now I tried Libreoffice calc and it doesn't seem to work as
expected. When I press Ctrl+Alt+C, using the *left* Alt key, it looks
as if the cell was copied.  Using the *right* Alt key for Ctrl+Alt+C
brings up a yellowish window which is probably what should happen
because Ctrl+Alt+C is supposed to insert a comment.

Oh, interestingly, pressing Alt-x in Emacs does work when I use the
*right* Alt key!  That's something new!

> If you are on X, can you use xev to confirm that it sends the correct keycode?

I could switch back to see what it sends, but since I want to use
wayland, there isn't much point ...

When I start xev in vterm in emacs in wayland, it says


KeyPress event, serial 38, synthetic NO, window 0xe00001,
    root 0x378, subw 0x0, time 44020369, (3073,685), root:(3123,812),
    state 0x10, keycode 64 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 38, synthetic NO, window 0xe00001,
    root 0x378, subw 0x0, time 44020562, (3073,685), root:(3123,812),
    state 0x90, keycode 64 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False


for *left* Alt and


KeyPress event, serial 38, synthetic NO, window 0xe00001,
    root 0x378, subw 0x0, time 44174354, (159,-25), root:(209,102),
    state 0x10, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 38, synthetic NO, window 0xe00001,
    root 0x378, subw 0x0, time 44174482, (159,-25), root:(209,102),
    state 0x18, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False


for *right* Alt.  I guess it should say Alt_L for *left* Alt.

So at least that's interesting --- but how do I get the left Alt key
to work right?

I haven't been able to find out how to change keyboard layouts with
wayland.  There must be some place where they are defined because
there is many premade keyboard layouts I can pick from for all kinds
of different languages.