Botão do polegar do mouse Logitech não está aparecendo no xev

Question

Recentemente, recebi o Logitech M720. Pressionando o botão do polegar em xev dá o seguinte:

KeyPress event, serial 36, synthetic NO, window 0x2c00001,
    root 0x270, subw 0x0, time 1922861, (169,43), root:(248,150),
    state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 36, synthetic NO, window 0x2c00001,
    root 0x270, subw 0x0, time 1922894, (169,43), root:(248,150),
    state 0x4, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

LeaveNotify event, serial 36, synthetic NO, window 0x2c00001,
    root 0x270, subw 0x0, time 1922894, (169,43), root:(248,150),
    mode NotifyNormal, detail NotifyAncestor, same_screen YES,
    focus YES, state 12

EnterNotify event, serial 36, synthetic NO, window 0x2c00001,
    root 0x270, subw 0x0, time 1922920, (169,43), root:(248,150),
    mode NotifyNormal, detail NotifyAncestor, same_screen YES,
    focus YES, state 12

KeymapNotify event, serial 36, synthetic NO, window 0x0,
    keys:  112 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 

Tentar ligá-lo nos atalhos de teclado do gnome também não funciona. Não há entrada de botão no xev.

Usando xev | grep keycode :

state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
state 0x4, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,

No Windows, esse botão faz com que a aba alt esteja tentando fazer o mesmo aqui?