Re: Fn keys on Dell Latitude E6440

On Monday 14 April 2014 16:51:07 Pali Rohár wrote:
> Hello,
> 
> on my notebook dell-wmi kernel driver generates some scan
> codes when I press some of Fn key combinations. Now all these
> scan codes are mapped to key "prog3". I would like to add
> some actions for these Fn key combinations, so what do you
> think? Which key codes should be assigned for these scan
> codes? Note that these combinations are not special (and
> labeled) as other (like Fn+F11 = play/pause) and seems like
> windows does not recognize them.
> 
> Matthew, you are author of dell-wmi driver, do you know if
> there are some other secrets key combinations? And why first
> 10 Fn key combinations generate scan codes?
> 
> Output of commands:
> 
> $ lsinput
> 
> /dev/input/event7
>    bustype : BUS_HOST
>    vendor  : 0x0
>    product : 0x0
>    version : 0
>    name    : "Dell WMI hotkeys"
>    phys    : "wmi/input0"
>    bits ev : EV_SYN EV_KEY EV_MSC
> 
> $ /lib/udev/keymap -i /dev/input/event7
> 
> scan code: 0x10   key code: prog3   --> Fn+Q
> scan code: 0x11   key code: prog3   --> Fn+W
> scan code: 0x12   key code: prog3   --> Fn+E
> scan code: 0x13   key code: prog3   --> Fn+R
> scan code: 0x14   key code: prog3   --> Fn+T
> 
> scan code: 0x1E   key code: prog3   --> Fn+A
> scan code: 0x1F   key code: prog3   --> Fn+S
> scan code: 0x20   key code: prog3   --> Fn+D
> scan code: 0x21   key code: prog3   --> Fn+F
> scan code: 0x22   key code: prog3   --> Fn+G
> 
> $ cat /sys/class/dmi/id/sys_vendor
> Dell Inc.
> 
> $ cat /sys/class/dmi/id/product_name
> Latitude E6440

I looked deeper into dell-wmi driver and bios DMI keycode table. 
I will send patch for dell-wmi driver which adding support for Fn 
key combinations.

-- 
Pali Rohár
[email protected]

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