(1)? 以下是列出的整個按鍵喚醒的log關(guān)鍵點(diǎn)，每條都有粗體字說明其含義以及該注意的關(guān)鍵字；
(2)? 一條一條依次檢查，直到如果發(fā)現(xiàn)某條log找不到，那問題就出在這個地方；
(3) ?如果某個階段的時間比較長，可能造成不亮屏的假象，可以分析亮屏?xí)r間長的原因
(4)僅限于L之后的Android版本；
kernel-Check Point【1】：kernel 上報(bào)power key[kernel log]
[53:pmic_thread]kpd: Power Key generate, pressed=0
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Check Point【2】：上層收到按鍵事件[eng版本上才有此log，main_log]
11-21 16:57:31.001050 1020 1262 D WindowManager: interceptKeyTq keycode=26 ...
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Check Point【3】：PMS的wakeUp被調(diào)用[sys_log]
16:57:31.011153 1020 1262 I PowerManagerService: Waking up from sleep (uid 1000)...
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Check Point【4】：準(zhǔn)備繪制界面[sys_log]
11-21 16:57:31.022639 1020 1044 I DisplayPowerController: Blocking screen on until initial contents have been drawn.
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Check Point【5】：第一個wiating for drawn表示keyguard畫完，開始畫window[sys_log]
11-21 16:57:31.062667 1020 1041 I WindowManager: Waiting for drawn Window{6732b98 u0 com.android.settings/com.android.settings.SubSettings}:
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check Point【6】：底層resume時間L版本 setAutoSuspend/M版本 setPowerMode【main_log】
注意：這個log出現(xiàn)的時間點(diǎn)不是固定的，要看底層resume的時間
16:57:31.436586 1020 1301 D SurfaceControl: Excessive delay in setPowerMode(): 403ms【M 版本】
15:41:07.827 911 2234 D PowerManagerService-JNI: Excessive delay in autosuspend_disable() while turningscreen on: 424ms【L版本】
Check Point【7】：繪制界面完成及花費(fèi)的時間[sys_log]
11-21 16:57:31.431161 1020 1044 I DisplayPowerController: Unblocked screen on after 409 ms
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Check Point【8】：上層設(shè)置背光[sys_log]
11-21 16:57:31.443164 1020 1044 D DisplayPowerState: Requesting new screen state: state=ON, backlight=211
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Check Point【9】：底層設(shè)置背光[sys_log,亮屏?xí)r間=power key到此處的時間，不一定每個版本都有此log，kernel log]
提示：如果出現(xiàn)此log表示屏幕已經(jīng)點(diǎn)亮
<7>[ 553.658233] (3)[1301:PhotonicModulat][name:leds&][LED]SetBacklightdirectly 211 at time 4294992661, mapping level is 211
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Check Point【10】：亮屏操作完成[sys_log]
11-21 16:57:31.556750 1020 1044 D DisplayPowerController: Finished business...
