按下Android电源按钮时，液晶背光会打开和关闭。但是从过去一天开始，我的液晶背光灯没有打开。 按下15至20次后，背光打开几分钟然后再次熄灭。 当我执行电源按钮操作时，我发现它生成了一个错误报告，我想分析它。 这就是关于背光的说法：
<6>[59171.668361,2] isl98611 backlight off
<6>[59171.777714,7] Report pwrkey release event at: 2017-03-27 02:23:47 UTC
<6>[59171.803292,5] isl98611 backlight on
<3>[59171.850005,7] wlan: [9525:E :WDA] Failure in host offload REQ WDI API, free all the memory 3
<36>[59171.900305,4] type=1400 audit(1490581427.758:36571): avc: denied { ioctl } for uid=1000 pid=4063 comm="Binder_5" path="socket:[2630050]" dev="sockfs" ino=2630050 ioctlcmd=7704 scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=unix_stream_socket permissive=0
<36>[59171.900723,4] type=1400 audit(1490581427.758:36572): avc: denied { ioctl } for uid=1000 pid=4063 comm="Binder_5" path="socket:[2630050]" dev="sockfs" ino=2630050 ioctlcmd=7704 scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=unix_stream_socket permissive=0
<6>[59171.904836,6] stml0xx spi0.0: Sending Stowed status 0, als 490, prox 0
<6>[59172.275559,7] Report pwrkey press event at: 2017-03-27 02:23:48 UTC
<6>[59172.431993,7] Report pwrkey release event at: 2017-03-27 02:23:48 UTC
<6>[59172.630772,7] Report pwrkey press event at: 2017-03-27 02:23:48 UTC
<6>[59172.762033,7] Report pwrkey release event at: 2017-03-27 02:23:48 UTC
<6>[59172.972182,7] isl98611 backlight off
<3>[59173.070426,5] wlan: [9525:E :WDA] Failure in host offload REQ WDI API, free all the memory 3
<6>[59173.136285,6] isl98611 backlight on
-----And so on, Here i was pressing the power button ON and OFF ------
------ BACKLIGHTS ------
LCD brightness=0
Button brightness=*** /sys/class/leds/button-backlight/brightness: No such file or directory
Keyboard brightness=*** /sys/class/leds/keyboard-backlight/brightness: No such file or directory
ALS mode=*** /sys/class/leds/lcd-backlight/als: No such file or directory
LCD driver registers:
*** /sys/class/leds/lcd-backlight/registers: No such file or directory
更新 在观察DisplayPowerState代码后，我发现它也记录了这些信息。
Display Power Controller Locked State:
mDisplayReadyLocked=true
mPendingRequestLocked=policy=DOZE, useProximitySensor=false, screenBrightness=70, screenAutoBrightnessAdjustment=-0.02734375, brightnessSetByUser=true, useAutoBrightness=true, blockScreenOn=false, lowPowerMode=false, boostScreenBrightness=false, dozeScreenBrightness=30, dozeScreenState=OFF, buttonBrightnessOverride=-1
mPendingRequestChangedLocked=false
mPendingWaitForNegativeProximityLocked=false
mPendingUpdatePowerStateLocked=false
Display Power Controller Configuration:
mScreenBrightnessDozeConfig=17
mScreenBrightnessDimConfig=10
mScreenBrightnessDarkConfig=1
mScreenBrightnessRangeMinimum=1
mScreenBrightnessRangeMaximum=256
mUseSoftwareAutoBrightnessConfig=true
mAllowAutoBrightnessWhileDozingConfig=false
mColorFadeFadesConfig=false
Display Power Controller Thread State:
mPowerRequest=policy=DOZE, useProximitySensor=false, screenBrightness=70, screenAutoBrightnessAdjustment=-0.02734375, brightnessSetByUser=true, useAutoBrightness=true, blockScreenOn=false, lowPowerMode=false, boostScreenBrightness=false, dozeScreenBrightness=30, dozeScreenState=OFF, buttonBrightnessOverride=-1
mWaitingForNegativeProximity=false
mProximitySensor={Sensor name="Proximity sensor", vendor="TAOS", version=1, type=8, maxRange=100.0, resolution=100.0, power=0.0467, minDelay=0}
mProximitySensorEnabled=false
mProximityThreshold=5.0
mProximity=Unknown
mPendingProximity=Unknown
mPendingProximityDebounceTime=-1 (59223063 ms ago)
mScreenOffBecauseOfProximity=false
mAppliedAutoBrightness=false
mAppliedDimming=true
mAppliedLowPower=false
mPendingScreenOnUnblocker=null
mPendingScreenOff=false
mReportedToPolicy=REPORTED_TO_POLICY_SCREEN_OFF
mScreenBrightnessRampAnimator.isAnimating()=false
mColorFadeOnAnimator.isStarted()=false
mColorFadeOffAnimator.isStarted()=false
Display Power State:
mScreenState=OFF
mScreenBrightness=0
mButtonBrightness=0
mScreenReady=true
mScreenUpdatePending=false
mColorFadePrepared=false
mColorFadeLevel=0.0
mColorFadeReady=true
mColorFadeDrawPending=false
Photonic Modulator State:
mPendingState=OFF
mPendingBacklight=0
mActualState=OFF
mActualBacklight=0
mStateChangeInProgress=false
mBacklightChangeInProgress=false
mPendingButtonLight=0
mActualButtonLight=0
Color Fade State:
mPrepared=false
mMode=1
mDisplayLayerStack=0
mDisplayWidth=1080
mDisplayHeight=1920
mSurfaceVisible=false
mSurfaceAlpha=0.0
Automatic Brightness Controller Configuration:
mScreenAutoBrightnessSpline=MonotoneCubicSpline{[(0.0, 0.01953125: 0.0078125), (2.0, 0.03515625: 0.0063476563), (10.0, 0.07421875: 0.0032226562), (50.0, 0.13671875: 0.002001953), (90.0, 0.234375: 0.0031738281), (100.0, 0.2734375: 0.0), (150.0, 0.2734375: 0.0), (200.0, 0.2734375: 0.0), (300.0, 0.2734375: 0.0), (400.0, 0.2734375: 0.0), (500.0, 0.40625: 8.0078124E-4), (800.0, 0.48828125: 2.734375E-4), (1000.0, 0.54296875: 1.8229167E-4), (1300.0, 0.5703125: 1.1795343E-4), (3000.0, 0.81640625: 8.995864E-5), (4000.0, 0.8515625: 3.564453E-5), (8000.0, 0.99609375: 0.0), (20000.0, 0.99609375: 0.0), (30000.0, 1.0: 3.90625E-7)]}
mScreenBrightnessRangeMinimum=1
mScreenBrightnessRangeMaximum=256
mLightSensorWarmUpTimeConfig=0
mBrighteningLightDebounceConfig=2000
mDarkeningLightDebounceConfig=8000
mResetAmbientLuxAfterWarmUpConfig=true
Automatic Brightness Controller State:
mLightSensor={Sensor name="Ambient Light sensor", vendor="TAOS", version=1, type=5, maxRange=27000.0, resolution=1.0, power=0.25, minDelay=0}
mTwilight.getCurrentState()={TwilightState: isNight=false, mYesterdaySunset=26 Mar 2017 6:52:39 p.m., mTodaySunrise=27 Mar 2017 5:58:44 a.m., mTodaySunset=27 Mar 2017 6:52:42 p.m., mTomorrowSunrise=28 Mar 2017 5:58:03 a.m.}
mLightSensorEnabled=false
mLightSensorEnableTime=59170878 (52192 ms ago)
mAmbientLux=489.99997
mBrighteningLuxThreshold=539.0
mDarkeningLuxThreshold=391.99997
mLastObservedLux=518.0
mLastObservedLuxTime=59186385 (36685 ms ago)
mRecentLightSamples=0
mAmbientLightRingBuffer=[]
mScreenAutoBrightness=99
mScreenAutoBrightnessAdjustment=-0.02734375
mLastScreenAutoBrightnessGamma=1.0304959
mDozing=true
mHbmSessionLimit=180000
mHbmDailyLimit=0
mHbmOn=false
mLimitHbm=false
mLastHbmStartTime=0
mHbmDailyDuration=0
这是否意味着什么，或者是硬件问题，还是软件重新安装解决它。
答案 0 :(得分：0)
那么，首先尝试使用您设备的软件格式并查看它是否有效（大部分时间是否有效）并仍然出现错误然后检查您的设备电源按钮是否可能已经损坏这种情况发生在大多数三星上设备和互联网上有视频可用于修复电源按钮或无法修复然后更换它。