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The Microsoft Intelligent Platform Management Interface (IPMI) driver and WMI IPMI provider supply data from Baseboard Management Controller (BMC) operations to the operating system. It also supports an IPMI driver class. The __Win32Provider instance that represents this provider is named 'IPMIPrv'. The IPMI provider is installed by default.
Microsoft IPMI Implementation
The IPMI provider is a standard WMI provider that supplies classes, methods, and properties that represent BMC configuration and sensor data. The IPMI provider obtains BMC data through the IPMI driver. For more information about the role of WMI providers, see WMI Architecture.
The IPMI provider and driver enable you to perform the following operations remotely. These operations do not depend on the computer CPU, system BIOS, or the operating system:
Inventory
One server can survey all the computers on a network, even if the operating system is not running or deployed.
Monitoring
BMC sensor data or events from remote computers can be monitored either through the operating system (in-band) or by obtaining data directly from the BMC (out-of-band).
Logging
The IPMI provider gives you access to the events recorded in the BMC System Event Log (SEL). Each event corresponds to a LogRecord instance in the IPMI provider classes. You can view these events through the Event Collector tool, Wecutil.cmd. SEL events appear in the Hardware Events log in the Windows Event log. You can write custom events, such as bug check data and shutdown information, to the SEL.
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- The driver is named: usbaudio2.sys and the associated inf file is usbaudio2.inf. The driver will identify in device manager as 'USB Audio Class 2 Device'. This name will be overwritten with a USB Product string, if it is available. The driver is automatically enabled when a compatible device is attached to the system.
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To request BMC data using the WS-Management protocol, write Windows Remote Management (WinRM) scripts using WinRM Scripting API.
IPMI Provider
The Microsoft IPMI provider implements a subset of the standard IPMI CIM Mapping Specification.
The IPMI provider has several WMI classes that enable administrators to access BMC information through the IPMI Driver.
| Account | Represents a user account, which stores authentication and authorization data for the IPMI provider. |
| AdminDomain | Represents a grouping of computer system elements, represented by ComputerSystem instances. |
| AuthorizedPrivilege | Represents authorization information for an Account instance, which specifies account privileges to activities. |
| ComputerSystem | Represents a computing system in the management domain defined by AdminDomain. |
| ConcreteCollection | Provides a concrete class version of the CIM_Collection class. |
| LogRecord | Represents a log entry in the BMC System Event Log (SEL). |
| Microsoft_IPMI | Contains methods which issue commands to a device that has an implementation of IPMI. |
| NumericSensor | Represents a numeric type of sensor. |
| PrivilegeGroup | Represents a group of AuthorizedPrivilege objects. |
| RecordLog | Represents the BMC System Event Log (SEL). |
| RegisteredProfile | Represents a registered profile, which manages use cases for a system or service. |
| Sensor | Represents a hardware device capable of measuring the characteristics of some physical property, for example, the temperature or voltage of the computer system monitored by the BMC. |
| SystemSpecificCollection | Represents the collection of sensors for the BMC. Each ComputerSystem that represents a BMC has only one SystemSpecificCollection child. |
Because the IPMI provider is a WMI provider, you can obtain BMC data over a normal WMI DCOM connection either locally or remotely. However, when connecting through WMI, you cannot obtain data directly from the BMC hardware. Windows Remote Management enables you to access data directly from a BMC that implements the WS-Management protocol protocol, even if the associated computer operating system is unavailable or is not running on a Windows operating system.
Connections to remote computers through WMI use DCOM, which allocates ports dynamically. The Windows Firewall, if enabled, requires an appropriate configuration at startup to enable WMI DCOM connections. WinRM, which assigns one port, is more firewall-friendly. For more information about WMI remote connections, see Connecting to WMI on a Remote Computer.
For more information about IPMI classes, see Intelligent Platform Management Interface (IPMI) Classes.
IPMI Driver
The IPMI driver is a WDM kernel mode driver that communicates with the BMC using KCS (Keyboard Controller Style). For more information about driver installation, see Installation and Configuration for Windows Remote Management. It appears in the Device Manager as Microsoft SMBIOS Generic IPMI Compliant Device.
Related topics
Dash cam stops recording suddenly
Turn off motion detection feature. For smaller SD cards, this feature will stop recording whenever no motion is detected in front of the camera. When movement is detected the camera will start recording again. For larger SD cards this feature is not required.
Dash camera's screen goes blank
Turn off the back light or enable power save function. This feature will switch off the LCD screen after a selected time in order to reduce distraction at night. This may give the impression recording has stopped but it will still be recording in background.
Camera does not start recording after ignition switched on
This can happen if the internal battery is heavily discharged. If the camera has not been used for some time and the internal battery is fully discharged, it may take a few minutes before there is sufficient energy from the power adapter to charge the battery and power the dash camera.
The car DVR / dash cam recording is intermittent
● Check your SD card speed: use a SD card with a speed of at least Class6. If the card recording is not fast enough files may become corrupted.
● Make sure the SD card is not fake: there are some fake SD cards on the market, which may not perform to their specified speed and cause recording problems, especially when recording at Full HD resolution.
If you wish to check the speed of an SD card there are programs available such as HD Tune which can confirm the data transfer rate. The table below shows expected transfer rates for each class of SD card. Highlighted in red are speeds for the Class6 & Class10 cards recommended for use with common dash cameras.
● Make sure the SD card is compatible with camera.
● Make sure the SD card used is not UHS -Ultra High Speed type (indicated by a number inside a 'U'), as these may not be compatible with the current dash cameras.
● Check power supply.
● Ensure that the 12V power adapter is securely fitted into the car power socket, the LED is always illuminated, the engine is switched on. If the LED flickers or goes out during use, then the power adapter may not be securely fitted into the socket, causing the camera to power off.
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● Check whether the fuse in the end of the adapter is not blown. Check the cable for damage, which may have caused the fuse to blow.
● Check 12V power socket on Stop/Start vehicles.
● If you have a stop/start vehicle, amke sure that the 12V power socket does not power down when the vehicle enters stop/start mode. If this happens the dash camera will switch off too.
The dash cam's screen displayed 'Card Full/Error'
'Card Full': if the loop recording function is enabled the dash cam will operate properly and the oldest files wiull be automatically deleted, otherwise this message will appear on the screen everytime the card becomes full. To avoid this problem set the length of each video clip to 3 or 5 minutes.
'Card Error': the SD card is corrupted. Remove useful files then re-format the card using the camera menu option.
| You may also want to read: |
| Dash cam troubleshooting guide |
| Seeing is believing: can I use my cell phone as a dash cam? |
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