[SOLVED] Volume and Fn keys doesn't work.

[Tchiarot]

Hi Friends,

I recently install a Debian 8.0 Jessie on a Laptop Dell latitude E6540 with gnome 3.14+3.
But the problem is that it doesn't recongnize my multimedia buttons, I tried some methods but I didn't get results.

Code:

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$showkey --scancodes
volume up   -- 0xe0 0x30 0xe0 0xb0
volume down -- 0xe0 0x2e 0xe0 0xae
volume mute -- 0xe0 0x20 0xe0 0xa0

$showkey --keycodes
volume up   -- 115
volume down -- 114
volume mute -- 113

xev

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Volume up produces:

FocusOut event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyUngrab, detail NotifyPointer

FocusIn event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyGrab, detail NotifyPointer

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys:  1   0   0   0   0   0   0   0   0   0   0   0   0   0   0   8   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0 
Volume down:

FocusOut event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyGrab, detail NotifyAncestor

FocusOut event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyUngrab, detail NotifyPointer
 
FocusIn event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys:  2   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0

Volume mute:

FocusOut event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyGrab, detail NotifyAncestor

FocusOut event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyUngrab, detail NotifyPointer

FocusIn event, serial 37, synthetic NO, window 0x2000001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys:  2   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0

On Setting --> Keyboard --> Shortcuts --> Sound and Media :

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Volume up Audio mute
Volume down Audio lower volume
Volume mute Audio raise volume

On dconf org.gnome.settings-deamon.plugins.media-keys

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Volume up XF86AudioLowerVolume
Volume down XF86AudioRiseVolume
Volume mute XF86AudioMute

When I reassinged the keys on Settings>Keyboard>Shortcuts to F7, F8 and F9 it works, but when use the keys volume up, down and mute It doesn't show anything.

The same happens with Fn + Brightness keys, in this case it worked the first time but then stop to work I don't know why..

Please some help with this..

[Head_on_a_Stick]

Check your firmware (BIOS) menus for anything relating to function keys.

[Tchiarot]

Hi Head_on_a_Stick,

Thanks for answer, I check the Bios and found only one option about Fn:
* Fn Key Emulation
This option is enable by default the text says:

This option lets you use the <Scroll Lock> key on an external PS\2 keyboard the same way yo use the <Fn> key on the computer's internal keyboard.

I test turning off this option but with no results..

My Bios version is A12.

[Tchiarot]

Hi Additional to it,

When execute acpi_listen I get:

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button/volumeup VOLUP 00000080 00000000 K
button/volumedown VOLDN 00000080 00000000 K
button/mute MUTE 00000080 00000000 K

For Brightness:

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video/brightnessup BRTUP 00000086 00000000
 PNP0C14:00 000000d0 00000000
video/brightnessdown BRTDN 00000087 00000000
 PNP0C14:00 000000d0 00000000

[Tchiarot]

Hi Friends,

Sorry Finally found the error.. It was an autostart folder create on the .config file of user, this folder contains a Gnome-terminal file with some configuration that causes the error.

Remove the folder and all works fine.

Thanks for take a time for read.

[Head_on_a_Stick]

Please edit the title of the thread & put "[SOLVED]" at the start to help any other users who may have this problem.