From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lorenzo Colitti Subject: Battery change in sleep mode breaks battery support Date: Wed, 09 Feb 2005 15:46:35 +0100 Message-ID: <420A224B.9050308@colitti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi, I am having problems with battery monitoring and sleep mode: if I plug in or unplug the battery while the machine is asleep, when it wakes up the change has not been registered and no further changes are logged. This means that I suspend the machine while on AC power and wake it up on battery power, there is no way for me to keep track of how much charge is left, which is a problem! As an example, I started with init=/bin/sh, with no battery and AC plugged in, and did the following: > sh-3.00# modprobe battery > ACPI: Battery Slot [C138] (battery absent) > ACPI: Battery Slot [C137] (battery absent) > sh-3.00# modprobe ac > ACPI: AC Adapter [C135] (on-line) > sh-3.00# echo 3 > /proc/acpi/sleep While the machine was asleep, I plugged in the battery and removed AC power, then turned the machine on. The kernel didn't notice that the battery had been plugged in: > sh-3.00# cat /proc/acpi/battery/C138/info > present: no > sh-3.00# cat /proc/acpi/battery/C137/info > present: no > sh-3.00# cat /proc/acpi/ac_adapter/C135/state > state: off-line Unplugging and reinserting the battery and/or reloading the battery module didn't help. :( The machine is an HP NC6000 on which ACPI mostly works (decompiling and recompiling the DSDT yields only the warning "Unknown reserved name (_WDG)"). I have ACPI debugging enabled in the kernel, but I don't know how to use it. Any ideas? Thanks! Lorenzo ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click