Hi Len, hi all, Currently the ACPI power meter driver lives in drivers/acpi, and depends on HWMON. I don't think it makes sense because, in the configuration menu, the user sees the ACPI options first, and HWMON comes later, so if HWMON is disabled, the user has no idea that the ACPI power meter driver exists. It happens that CONFIG_HWMON currently defaults to y so this scenario won't happen on new configurations, but it could still happen when people upgrade an old configuration. It could also happen that a user selects the ACPI power meter, then looks at the driver list under CONFIG_HWMON and decides that he/she doesn't need anything there and deselects HWMON, and disables the ACPI power meter driver as a result. Lastly, there is no guarantee that CONFIG_HWMON will default to y forever, I admit I'm unsure why it is that way. I think that it would make more sense to: * either move the ACPI power meter driver to drivers/hwmon, and treat it like any other hardware monitoring driver, with a dependency on ACPI; * or leave the ACPI power meter driver in drivrs/acpi, but turn the "depends on HWMON" into "select HWMON", so it can't be hidden or unselected by accident. Opinion anyone? -- Jean Delvare -- 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