IBM ThinkPad T42
From ArchWiki
[edit] Configuration
[edit] ACPI
Refresh pacman package list and then install acpid:
# pacman -Sy # pacman -S acpid
Add acpid to the DAEMONS list in Template:Path to have it start at boot-up.
To start acpid:
# /etc/rc.d/acpid start