Thanks. So it seems some of the Fn keys appear through the "Asus WMI hotkeys" device, but others don't. The only other plausible device is "AT Translated Set 2 keyboard" (i. e. the standard keyboard which also sends the letters and numbers). Can you re-run "sudo evtest", select that one, and repeat this exercise for the non-working Fn keys such as F1/F2?
Thanks. So it seems some of the Fn keys appear through the "Asus WMI hotkeys" device, but others don't. The only other plausible device is "AT Translated Set 2 keyboard" (i. e. the standard keyboard which also sends the letters and numbers). Can you re-run "sudo evtest", select that one, and repeat this exercise for the non-working Fn keys such as F1/F2?