physical_keycode differs between X11 and wayland

[jrb0001]

Tested versions

Reproducible in:

• v4.3.stable.official [77dcf97]
• v4.4.dev4.official [36e6207]

System information

Godot v4.4.dev4 - Arch Linux #1 SMP PREEMPT_DYNAMIC Fri, 01 Nov 2024 03:30:41 +0000 on Wayland - X11 display driver, Multi-window, 3 monitors - Vulkan (Mobile) - dedicated AMD Radeon RX 6900 XT (RADV NAVI21) - AMD Ryzen 9 3950X 16-Core Processor (32 threads)

Issue description

On a swiss german keyboard layout, the physical_keycode of the § and < keys are swapped on Wayland compared to X11. keycode and key_label are the same. The keys Ü and ¨ have different physical_keycode and keycode, but the same key_label. I tested a few other ISO layouts and they had the same issue.

Keyboard	X11 physical_keycode	Wayland physical_keycode	X11 keycode	Wayland keycode	X11 key_label	Wayland key_label
§ (below Esc)	96	167	167	167	167	167
< (left of Y)	167	96	60	60	60	60
Ü (right of P)	91	123	91	123	220	220
¨ (right of Ü)	93	125	93	125	93	125

Steps to reproduce

You need a keyboard with a physical ISO layout. JIS apparently works correctly (#99008 (comment)). No idea about ANSI.

Open the attached MRP and set display/display_server/driver.linuxbsd to x11 or wayland. Start the project, press the keys from the table above and check the values in the output tab in the editor.

Minimal reproduction project (MRP)

bug-physical_key.zip

[buresu]

@jrb0001 Hello, I have changed the keycode system for japanese on Wayland in the current master(a40fc23). How about the current test results?

[jrb0001]

@buresu Unfortunately no change at all.

[buresu]

@jrb0001 Thank you for checking.
I tested by setting a Swiss German keyboard layout in a Japanese keyboard environment and checked the key codes, and it seems that correct values are being obtained regardless of my changes.
Since "<" does not physically exist on Japanese keyboards, I checked "§", "Ü", and "¨".
This may only serve as a reference since the physical keyboards are not exactly the same.