Hi,

i'm absolutely new to the world of Allegro development and stumbled across my first issue. My application uses keyboard events and the generated keycodes differ on Windows and Linux.

My keyboard layout uses Alt-Graph to access some keys like the at-Symbol (@) - i'm using a german keyboard. On Linux, whenever i press Alt-Graph+Q to generate the at-Symbol, it's picked up correctly by Allegro:

KEY_DOWN  code=220, char=' ' (   0), modifiers=00000000, [ISO_Level3_Shift]
KEY_DOWN  code=017, char=' ' (   0), modifiers=00000000, [q]
KEY_CHAR  code=017, char='@' (  64), modifiers=00000220, [q]
KEY_UP    code=017, char=' ' (   0), modifiers=00000000, [q]
KEY_UP    code=220, char=' ' (   0), modifiers=00000000, [ISO_Level3_Shift]

however, the same code compiled on Windows (with MinGW), yields a completely different result:

KEY_DOWN  code=220, char=' ' (   0), modifiers=00000000, [ALTGR]
KEY_DOWN  code=017, char=' ' (   0), modifiers=00000000, [Q]
KEY_CHAR  code=017, char='q' ( 113), modifiers=00000242, [Q]
KEY_UP    code=017, char=' ' (   0), modifiers=00000000, [Q]
KEY_UP    code=217, char=' ' (   0), modifiers=00000000, [LCTRL]

The application used to generate the output above is the keyboard event example from the official repository (https://github.com/liballeg/allegro5/blob/master/examples/ex_keyboard_events.c)

Any ideas what i have done wrong? Or is this simply a bug in the library?

Best regards,
Egon

/edit: I've attached the test program i used. Would be great if someone could verify the results i got to make sure that it's not a configuration issue on my side. I'm running Windows 11 22H2 (English) with German (QWERTZ) keyboard layout

Yes definitely - i'm a german native speaker and use german keyboard layouts almost on every device :-)

Inserting Alt-Graph symbols like @, {, }, ... works in every other application i use.

Which version of Allegro have you used? I want to cross-check with that version to determine if it's a regression introduced lately.

I tested 5.2.8 on my Windows 10 laptop and it returns 'q' not '@' for CTRL-ALT-Q

Same for AltGR