harmony 鸿蒙Brightness Error Codes

Brightness Error Codes

NOTE

This topic describes only module-specific error codes. For details about universal error codes, see Universal Error Codes.

Error Message

Operation failed. Cannot connect to service.

Description

This error code is reported for a service connection failure.

Possible Causes

Solution

Check whether the system services are running properly.

Run the following command on the console to view the current system service list:
```
> hdc shell hidumper -ls
```
Check whether DisplayPowerManagerService is included in the system service list.

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