ACPI establishes industry-standard interfaces for OS-directed configuration and power management on laptops, desktops, and servers. Here is the home page: ACPI - Advanced Configuration & Power Interface.
acpid won't start but logs nothing
Problem: acpid won't start, but doesn't log anything to the terminal, dmesg, /var/log/messages or /var/log/acpid.
localhost steph # /etc/init.d/acpid start
* Starting acpid ... [ !! ]
Possible solution: Check the size of the log file /var/log/acpid. If it reaches 2G in size then acpid will stop working without telling you why. Clear the file and hopefully all will be ok.
localhost steph # echo "" > /var/log/acpid localhost steph # /etc/init.d/acpid start * Starting acpid ... [ ok ]
I learnt this solution from a post on the Gentoo forums.
Other ACPI notes
- Continuous ACPI lid events and 100% CPU usage – How to work around a problem whereby the ACPI daemon acpid uses 100% of the CPU when the lid button is depressed.
- ACPI low battery warning – A script (or two) that you can use to monitor your battery using ACPI and alert you when it's running low.
- Custom DSDT – How to apply a custom DSDT to fix continuous lid events on an Acer Travelmate 8104