왼쪽 Alt+tab 및 왼쪽 Ctrl+왼쪽 Shift+tab이 외부 키보드에서 작동하지 않습니다.

나는 사용해왔다외부 키보드Linux Mint 데스크탑에서 사용 가능합니다.
최근의왼쪽Alt+Tab(현재 열려 있는 창 간 전환) 및왼쪽 Ctrl+왼쪽 Shift+Tab(Chrome에서 이전 탭으로 이동)이 작동을 멈췄습니다.

노트:위 조합에 대해 오른쪽(Cntrl, Shift, Alt) 키를 사용하면 훌륭하게 작동합니다. 왼쪽 클릭(Cntrl, Shift, Alt)이 작동합니다(위 조합에서는 작동하지 않음).

고칠 수 있는 방법이 있다면 알려주세요.
먼저, 감사합니다.

편집하다:
다음 명령의 출력

시프

KeyPress event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1530392, (157,-10), root:(742,289),
    state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1532104, (157,-10), root:(742,289),
    state 0x18, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1532824, (157,-10), root:(742,289),
    state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1534480, (157,-10), root:(742,289),
    state 0x18, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1539400, (157,-10), root:(742,289),
    state 0x10, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1539496, (157,-10), root:(742,289),
    state 0x11, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1539520, (157,-10), root:(742,289),
    state 0x10, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1539576, (157,-10), root:(742,289),
    state 0x11, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 39, synthetic NO, window 0x5e00001,
    root 0x6a7, subw 0x0, time 1542144, (157,-10), root:(742,289),
    state 0x15, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

setxkbmap-인쇄

xkb_keymap {
    xkb_keycodes  { include "evdev+aliases(qwerty)" };
    xkb_types     { include "complete"  };
    xkb_compat    { include "complete"  };
    xkb_symbols   { include "pc+us+inet(evdev)" };
    xkb_geometry  { include "pc(pc105)" };
};