brightness key event

app_39@android:/ $ export PATH=/data/local/bin:$PATH
app_39@android:/ $ su
app_39@android:/ # getevent
add device 1: /dev/input/event8
  name:     "Android Power Button"
add device 2: /dev/input/event7
  name:     "tegra-alc5632 Headset Jack"
add device 3: /dev/input/event6
  name:     "USB Camera"
add device 4: /dev/input/event3
  name:     "NVEC lid switch button"
add device 5: /dev/input/event5
  name:     "ETPS/2 Elantech Touchpad"
add device 6: /dev/input/event2
  name:     "NVEC power button"
could not get driver version for /dev/input/mouse0, Not a typewriter
add device 7: /dev/input/event1
  name:     "NVEC sleep button"
add device 8: /dev/input/event0
  name:     "nvec keyboard"
could not get driver version for /dev/input/mice, Not a typewriter
add device 9: /dev/input/event4
  name:     "gpio-keys"
/dev/input/event0: 0001 001c 00000000
/dev/input/event0: 0000 0000 00000000
/dev/input/event0: 0001 0040 00000001
/dev/input/event0: 0000 0000 00000000
^@/dev/input/event0: 0001 0040 00000000
/dev/input/event0: 0000 0000 00000000
/dev/input/event0: 0001 0041 00000001
/dev/input/event0: 0000 0000 00000000
^@/dev/input/event0: 0001 0041 00000000
/dev/input/event0: 0000 0000 00000000
/dev/input/event0: 0001 001d 00000001
/dev/input/event0: 0000 0000 00000000
/dev/input/event0: 0001 002e 00000001
/dev/input/event0: 0000 0000 00000000
^C^C^C^C^C^C^C^C^C^C^C
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