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近期出现了一个黑屏问题：
仪表显示，主副屏黑的 ：原因背光开启太晚，导致拍照时候是黑的，太晚的原因是绘制进程出现异常导致重启延后了时间，绘制进程crash原因是hwc调用底层库卡住，需更新hwc对应的so文件。

一 先来看下 qnx和bsp的分析

2024-08-02 08:20:09.967     0     0 W         : set ivi0_backlight_en 1  //中控开启背光

2024-08-02 08:20:09.967     0     0 W         : set ivi1_backlight_en 1 //副驾开启背光   

分析：最后一次拍照时间： ON_点火_15s_20240802082006.jpg  拍照的时候 背光还没有拉起来 

qnx  log 开启背光 Aug 02 08:20:09.906   

Aug 02 08:20:09.906                  qvm.745541..0                 slog      0  qvm[backlight_ops.c:796]: zsm backlight_switch: displayid:0x1; on = 0x1

Aug 02 08:20:09.906                  qvm.745541..0                 slog      0  qvm[backlight_ops.c:691]: zsm ivi0_skyworth_backlight_en:/dev/gpio54 on = 0x1

Aug 02 08:20:09.909                  qvm.745541..0                 slog      0  qvm[backlight_ops.c:709]: zsm ivi0_skyworth_backlight_en: open ivi0 backlight
：
Aug 02 08:20:09.909                  qvm.745541..0                 slog      0  qvm[backlight_ops.c:721]: zsm ivi0_skyworth_backlight_en:set /dev/gpio54 value = 0x1 is OK

二 来看fwk层分析

android.hardware.graphics.composer服务crash导致后续的surfaceflinger, zygote, system_server进程重启

行 119694: 2024-08-02 08:18:35.175   482   482 D SurfaceFlinger: Setting power mode 0 on display 132
    行 122846: 2024-08-02 08:19:47.697   482   482 D SurfaceFlinger: Setting power mode 2 on display 129
    行 124020: 2024-08-02 08:19:48.818   482   482 E HwcComposer: executeCommands failed because of Status(EX_TRANSACTION_FAILED): 'DEAD_OBJECT: '
    行 124021: 2024-08-02 08:19:48.818   482   482 E HWComposer: getDeviceCompositionChanges: validate failed for display 129: NoResources (6)
    行 124022: 2024-08-02 08:19:48.818   482   482 E CompositionEngine: chooseCompositionStrategy failed for Internal display: -75 (Value too large for defined data type)

执行hal层的compose指令失败了,发现这里出现了tombstone了

ABI: 'arm64'
Timestamp: 2024-08-02 08:19:47+0800
pid: 451, tid: 5434, name: HwBinder:451_3  >>> /vendor/bin/hw/android.hardware.graphics.composer@2.4-service <<<
uid: 1000
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x78018100010

... ...

      #00 pc 000000000003c1b4  /vendor/lib64/libsdmextension.so (sdm::Layer::~Layer()+28) (BuildId: 7fdead60b2ecc105e54a7ce7b02763b0)
      #01 pc 000000000006a2ec  /vendor/lib64/libsdmextension.so (sdm::CacheManager::FreeLayerStack(int)+308) (BuildId:

三 问题确认，转给高通分析，更新相应的so库 问题解决