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# output of 'xev -root' pressing 'vol mute' 'vol down' and 'vol down'
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FocusIn event, serial 18, synthetic NO, window 0x9c,
mode NotifyGrab, detail NotifyInferior
KeymapNotify event, serial 18, synthetic NO, window 0x0,
keys: 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PropertyNotify event, serial 18, synthetic NO, window 0x9c,
atom 0x144 (_NET_WM_USER_TIME), time 6527245, state PropertyNewValue
FocusOut event, serial 19, synthetic NO, window 0x9c,
mode NotifyUngrab, detail NotifyInferior
FocusIn event, serial 19, synthetic NO, window 0x9c,
mode NotifyGrab, detail NotifyInferior
KeymapNotify event, serial 19, synthetic NO, window 0x0,
keys: 4294967239 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PropertyNotify event, serial 19, synthetic NO, window 0x9c,
atom 0x144 (_NET_WM_USER_TIME), time 6529068, state PropertyNewValue
FocusOut event, serial 19, synthetic NO, window 0x9c,
mode NotifyUngrab, detail NotifyInferior
FocusIn event, serial 19, synthetic NO, window 0x9c,
mode NotifyGrab, detail NotifyInferior
KeymapNotify event, serial 19, synthetic NO, window 0x0,
keys: 4294967239 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
PropertyNotify event, serial 19, synthetic NO, window 0x9c,
atom 0x144 (_NET_WM_USER_TIME), time 6531176, state PropertyNewValue
FocusOut event, serial 19, synthetic NO, window 0x9c,
mode NotifyUngrab, detail NotifyInferior