Hi All, Kernel acpi battery driver loading fails eventhouh I have FW entry for PNP0C0A. but I see acpi ac driver is getting loaded without any issue. One thing I observed is FW doesn't implement the _CSR method which is being implemented by most of PNP devices. I have enabled the following driver in kernel config. CONFIG_ACPI=y CONFIG_ACPI_SLEEP=y # CONFIG_ACPI_PROCFS is not set CONFIG_ACPI_PROCFS_POWER=y # CONFIG_ACPI_EC_DEBUGFS is not set CONFIG_ACPI_PROC_EVENT=y CONFIG_ACPI_AC=y CONFIG_ACPI_BATTERY=y CONFIG_ACPI_BUTTON=y CONFIG_ACPI_VIDEO=y CONFIG_ACPI_FAN=y CONFIG_PNPACPI=y Also does acpi battery depends on BIOS for loading? Thanks, Ram -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html