fn_row_policy=7 for UX8406 Mode B swap (F4–F12) + 7.1.3 port - #1
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Intercept UX8406 main keyboard HID reports before evdev when fn_row_policy bit 3 is set, toggle if4 kbd backlight, and fix sniff to watch Asus Keyboard nodes without detaching USB drivers. Co-authored-by: Cursor <cursoragent@cursor.com>
When policy bits 0–2 are set, plain F1–F3 inject KEY_MUTE, KEY_VOLUMEDOWN, and KEY_VOLUMEUP on the main keyboard input node; F4 backlight path unchanged. Co-authored-by: Cursor <cursoragent@cursor.com>
Media keys were appearing on if3 (event6) without affecting volume. Default simulate now matches Mode B Fn+F (KEY_F1–F3 on if0); optional fn_row_media_keys=1 restores KEY_MUTE/VOLDOWN/VOLUP with input_set_capability. Co-authored-by: Cursor <cursoragent@cursor.com>
F1-F3 bits set route plain presses to if3 consumer media; clear bits emit KEY_F1-F3 on if0. F4+ bits set stepped Fn+F4 backlight on if4 and plain KEY_Fn passthrough; Meta held bypasses policy. Removes wrong plain-F4 toggle. Co-authored-by: Cursor <cursoragent@cursor.com>
Plain F1-F3 on if3 consumer (03e2/ea/e9) remaps to KEY_F1-F3 on if0 when bits clear; block duplicate if4 5ac7 during plain F4 on if0; swallow injected KEY_F4 vs Fn+F4 stepped backlight on if0. Co-authored-by: Cursor <cursoragent@cursor.com>
Docked Mode B baseline remapped so plain F4–F12 are KEY_Fn and Fn+F runs specials (BL, brightness, Win+P display, MyASUS 0x86). F1–F3 left on firmware EC volume; default policy 7 via kmod_deploy and OpenRC conf. Co-authored-by: Cursor <cursoragent@cursor.com>
Port script accepts 7.0.12/7.1.3 asus_event whitespace; regenerate both kernel patches (7.1.3 build verified). Rename README.md to README.ux8406.md ahead of multi-model docs work. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
fn_row_policy=7: plain F4–F12 →KEY_Fn, Fn+F → specials (kbd BL, brightness, Win+P display, MyASUS0x86/KEY_PROG1); F1–F3 left on firmware EC volume; Meta+F workspace preserved.port-ux8406.pyaligned for linux-7.1.3 (asus_event whitespace); bothux8406-hid-asuspatches regenerated; 7.1.3 OOT module builds.README.md→README.ux8406.mdfor upcoming multi-model docs; OpenRC/kmod_deploydefaultfn_row_policy=7.Test plan
make patchesfor 7.0.12 + 7.1.3make build-7.1.3succeeds