Hi, if this isn't the correct mailing list please yell. I'm the author of upower which is a userspace service that presents the power devices in the system as a DBus interface for the session to use. In struct power_supply there is a boolean use_for_apm which seems to be 1 for devices actually powering the system, and 0 for devices attached to the machine. Would this be sane to export into sysfs as something sane? The reason I ask, is that upower has to decide if the system as a whole has several high level states, e.g. "low-power" or "critically-low-power" and for that it needs to decide if the battery backing the power supply device is critical to the system power state. This would mean that a ACPI battery or UPS running low would mean the system is low, but a USB mouse or a wacom tablet would not prompt the low power warning. This email has been triggered by a bug report : https://bugs.freedesktop.org/show_bug.cgi?id=38569 in which the kernel patch http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=59d2334ac9f4255f5f8f3e4e1bf41653e0bba99e;hp=4da361b69102cdffe73006771eae7504d2cb8736 added the power_supply device which confuses upower. The alternative is to change the wacom power_supply code from type=POWER_SUPPLY_TYPE_BATTERY to something else, e.g. POWER_SUPPLY_TYPE_ACCESSORY which upower can easily key from. I really don't want to blacklist "battery_wacom" as that seems like such a hack. Thanks for any comments, Richard. -- 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
