Hi, Unfortunately those patches have broken the backlight reporting on older laptops, which do rely on the old mechanism. For instance, on my Asus UX32A/VD when pressing the backlight up/down button the backlight changes accordingly, but the event is not caught by the system (more precisely, dmesg is complaining of unknown key codes): > [ 3167.842213] asus_wmi: Unknown key code 0x29 > [ 3168.105096] asus_wmi: Unknown key code 0x28 > [ 3168.142526] asus_wmi: Unknown key code 0x27 > [ 3168.178860] asus_wmi: Unknown key code 0x26 > [ 3168.216027] asus_wmi: Unknown key code 0x25 > [ 3168.256511] asus_wmi: Unknown key code 0x24 > [ 3168.292907] asus_wmi: Unknown key code 0x23 > [ 3168.329704] asus_wmi: Unknown key code 0x22 > [ 3168.366554] asus_wmi: Unknown key code 0x21 > [ 3168.406681] asus_wmi: Unknown key code 0x20 > [ 3168.443330] asus_wmi: Unknown key code 0x20 > [ 3168.480900] asus_wmi: Unknown key code 0x20 > [ 3168.516326] asus_wmi: Unknown key code 0x20 > [ 3168.554006] asus_wmi: Unknown key code 0x20 > [ 3168.593320] asus_wmi: Unknown key code 0x20 > [ 3168.630108] asus_wmi: Unknown key code 0x20 > [ 3168.670110] asus_wmi: Unknown key code 0x20 > [ 3168.943217] asus_wmi: Unknown key code 0x11 > [ 3169.203349] asus_wmi: Unknown key code 0x12 > [ 3169.243239] asus_wmi: Unknown key code 0x13 > [ 3169.279881] asus_wmi: Unknown key code 0x14 > [ 3169.316311] asus_wmi: Unknown key code 0x15 > [ 3169.352887] asus_wmi: Unknown key code 0x16 > [ 3169.392806] asus_wmi: Unknown key code 0x17 > [ 3169.429301] asus_wmi: Unknown key code 0x18 > [ 3169.465843] asus_wmi: Unknown key code 0x19 > [ 3169.502404] asus_wmi: Unknown key code 0x1a > [ 3169.542308] asus_wmi: Unknown key code 0x1a > [ 3169.578938] asus_wmi: Unknown key code 0x1a > [ 3169.615506] asus_wmi: Unknown key code 0x1a > [ 3169.652002] asus_wmi: Unknown key code 0x1a > [ 3169.692280] asus_wmi: Unknown key code 0x1a In this case it seems that the backlight-down codes go from 0x20 to 0x29 while the -up from 0x11 to 0x1a, so assuming they are not clamped somewhere else they should not conflict with the ones used on newer models. By the way, I only found those codes to be reported by asus-wmi, while other inputs remain silent while pressing those keys. Let me know if I can help with some logs or anything. Regards, Juri
