ACPI Battery Monitor on Acer laptop
Submitted by kwalker on Mon, 12/26/2005 - 15:07.
Power Management
Posts: 3
Posts: 3
When I go to the power management section of the KDE Control Center the Power Control, Low Battery Warning and Low Battery Critical sections all give the warning:
"Your computer seems to have a partial ACPI installation. ACPI was probably enabled, but some of the sub-options were not - you need to enable at least 'AC Adaptor' and 'Control Method Battery' and then rebuild your kernel."
Things are working so nicely with Mepis, wireless was easy to set up and everything else worked out of the box, I hate to mess with kernel compiling.
Is there another way?
Or try Mepis 6 - the battery
Submitted by acesabe on Sun, 07/02/2006 - 13:11.
Posts: 190
Posts: 190
Or try Mepis 6 - the battery monitor works for the first time with this version of Mepis on my Acer laptop (Aspire 1510)
Fix for partial ACPI on Acer notebooks
Posts: 80
The error is due to a broken DSDT (Differentiated System Display Table) code supplied by Acer. Gentoo Wiki has an excellent coverage of this defect.
WARNING: requires patching files in /boot. Make sure you have the live CD around to recover in case the patches fail.
1# apt-get install iasl
2# mkdir /tmp/dsdt; cd /tmp/dsdt
3# cp /proc/acpi/dsdt dsdt.dat
4# iasl -d dsdt.dat
5# iasl -tc dsdt.dsl
This step threw up a bunch of errors and warnings. I fixed only the errors to get a clean DSDT.aml file. Next, this file was appended along with a signature to initrd file:
6# echo "INITRDDSDT123DSDT123" >>dsdt.sig
7# cat /boot/initrd.img-2.6.15-1-586tsc dsdt.sig DSDT.aml >/boot/initrd-dsdt.img-2.6.15-1-586tsc
I added the following boot label in /boot/grub/menu.lst:
title MEPIS (with ACPI fixed)
kernel /boot/vmlinuz-2.6.15-1-586tsc root=/dev/hda1 nomce quiet vga=791 ec_burst=1
initrd /boot/initrd-dsdt.img-2.6.15-1-586tsc
and rebooted my notebook. ACPI works like a charm now.
Hope this helps .. arbus