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Dell watchdog timer utility9/2/2023 The format of the output should be thoroughly checked, since many methods can If the function has multiple outputs, when an ACPI packageĬontaining the outputs in the same order is returned If the function has only a single output, then an ACPI object Other WMI methods may ignore this argument or interpret itĭifferently. Smart Battery Data Specification, so unknown battery-related methods are The data format of many battery-related methods seems to be based on the Return malformed data in case of an error. Likely to follow this standard in some way. Returns the design capacity of the battery in mAh as an u16. Returns the full charge capacity of the battery in mAh as an u16. Returns the manufacture name of the battery as an ASCII string. Returns the manufacture date of the battery as an u16. The date is encoded in the following manner:īits 5 to 8 contain the manufacture month.īits 9 to 15 contain the manufacture year biased by 1980. The data format needs to be verified on more machines. Returns the serial number of the battery as an u16. Returns the chemistry of the battery as an ASCII string. Returns the temperature of the battery in tenth degree kelvin as an u16. Returns the current flow of the battery in mA as an s16. Returns the voltage flow of the battery in mV as an u16. WMI method BatteryRelativeStateOfCharge() ¶ Returns a manufacture-defined value as an u16. Returns the capacity of the battery in percent as an u16. Returns the cycle count of the battery as an u16. The ACPI battery matching algorithm currently used inside the driver is Performs an analysis of the battery and returns a status code: Returns the ePPID of the battery as an ASCII string. Linux and Windows, which distorts the serial number of ACPI batteries on many This are differences in the handling of the ToHexString() ACPI opcode between Outdated and does not match the algorithm described above. Until this issue is resolved, the driver cannot use the aboveĪlgorithm. Load the dell-wmi-ddv driver, use the force module param To test different sensor type values, since on some machines this data is Related methods (sometimes overwriting static ACPI data fields can be used Use the built-in UEFI diagostics to view sensor types/values for fan/thermal Try to deduce the meaning of a certain WMI method by comparing the controlįlow with other ACPI methods (_BIX or _BIF for battery related methods Reverse-Engineering the DDV WMI interface ¶įind a supported Dell notebook, usually made after ~2020.ĭump the ACPI tables and search for the WMI device (usually called "ADDV").ĭecode the corresponding bmof data and look at the ASL code. In case the DDV WMI interface version available on your Dell notebook is not Use the debugfs interface to access the raw fan/thermal sensor buffer data.Ĭompare the data with the built-in UEFI diagnostics.
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