keyboard: use fallback layout if failing to load

src/backend/common.rs

@@ -68,10 +68,14 @@ where
 
         app.screens.clear();
         let data = if let Some(wl) = wl.as_mut() {
-            keymap = get_keymap_wl().ok();
+            keymap = get_keymap_wl()
+                .map_err(|f| log::warn!("Could not load keyboard layout: {}", f))
+                .ok();
             crate::overlays::screen::create_screens_wayland(wl, app)?
         } else {
-            keymap = get_keymap_x11().ok();
+            keymap = get_keymap_x11()
+                .map_err(|f| log::warn!("Could not load keyboard layout: {}", f))
+                .ok();
             match crate::overlays::screen::create_screens_x11pw(app) {
                 Ok(data) => data,
                 Err(e) => {

src/hid/x11.rs

@@ -10,6 +10,11 @@ pub fn get_keymap_x11() -> anyhow::Result<XkbKeymap> {
 
     let (conn, _) = xcb::Connection::connect(None)?;
     let device_id = get_core_keyboard_device_id(&conn);
+    if device_id == -1 {
+        return Err(anyhow::anyhow!(
+            "get_core_keyboard_device_id returned -1. Check your XKB installation."
+        ));
+    }
     let keymap = keymap_new_from_device(&context, &conn, device_id, xkb::KEYMAP_COMPILE_NO_FLAGS);
 
     Ok(XkbKeymap { context, keymap })

src/res/keyboard.yaml

@@ -86,5 +86,27 @@ labels:
     "Print":          ["Prn"]
     "Scroll":         ["Scr"]
     "Pause":          ["Brk"]
-    "XF86Favorites": ["Rofi"]
+    "XF86Favorites":  ["Menu"] # fallback labels below
+    "N1":             ["1", "!"]
+    "N2":             ["2", "@"]
+    "N3":             ["3", "#"]
+    "N4":             ["4", "$"]
+    "N5":             ["5", "%"]
+    "N6":             ["6", "^"]
+    "N7":             ["7", "&"]
+    "N8":             ["8", "*"]
+    "N9":             ["9", "("]
+    "N0":             ["0", ")"]
+    "Minus":          ["-", "_"]
+    "Plus":           ["=", "+"]
+    "Comma":          [" ,",  "<"]
+    "Period":         [" .",  ">"]
+    "Oem1":           [" ;",  ":"]
+    "Oem2":           [" /",  "?"]
+    "Oem3":           ["`", "~"]
+    "Oem4":           [" [",  "{"]
+    "Oem5":           [" \\", "|"]
+    "Oem6":           [" ]",  "}"]
+    "Oem7":           [" '",  "\""]
+    "Oem102":         [" \\", "|"]