Something

KeyPress event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215612460, (37,44), root:(708,72),
    state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

LeaveNotify event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613926, (37,44), root:(708,72),
    mode NotifyGrab, detail NotifyVirtual, same_screen YES,
    focus YES, state 4116

EnterNotify event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613926, (37,44), root:(708,72),
    mode NotifyUngrab, detail NotifyVirtual, same_screen YES,
    focus YES, state 20

KeymapNotify event, serial 31, synthetic NO, window 0x0,
    keys:  0   0   0   0   32  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

KeyRelease event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613927, (37,44), root:(708,72),
    state 0x14, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

ButtonPress event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613928, (37,44), root:(708,72),
    state 0x10, button 5, same_screen YES

EnterNotify event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x0, time 215613928, (37,44), root:(708,72),
    mode NotifyGrab, detail NotifyInferior, same_screen YES,
    focus YES, state 4112

KeymapNotify event, serial 31, synthetic NO, window 0x0,
    keys:  78  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

ButtonRelease event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613929, (37,44), root:(708,72),
    state 0x1010, button 5, same_screen YES

LeaveNotify event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x0, time 215613929, (37,44), root:(708,72),
    mode NotifyUngrab, detail NotifyInferior, same_screen YES,
    focus YES, state 16

KeyPress event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215613929, (37,44), root:(708,72),
    state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyRelease event, serial 31, synthetic NO, window 0x3c00001,
    root 0x4e, subw 0x3c00002, time 215615817, (37,44), root:(708,72),
    state 0x14, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False