Advanced Configuration and Power Interface, a standard for power management in operating systems.

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366
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7answers
24k views

How does a computer restart itself?

How can a computer restart itself? After it's off, how does it tell itself to come back on again? What kind of software is it that can do this?
7
votes
3answers
2k views

My computer reboots when I tell it to shutdown

There are about 40 computers at work with this problem. They all have an ASUS P5KPL/1600 motherboard. They are all running SUSE Linux 11.1. When I tell the computer to shutdown either through the UI ...
2
votes
3answers
2k views

Set fan speed by RPM on Thinkpad T420s in Linux

The only interface I've found for setting the fan speed with the thinkpad-acpi module, is setting pre-defined levels, 0-7. Example: sudo su -c 'echo "level 2" > /proc/acpi/ibm/fan' I would like ...
5
votes
2answers
3k views

System (ACPI.sys) is always using about 15-20% of my CPU

I have a 13" Sony Vaio laptop (model SVS13A1C5E) and I upgraded it to Windows 8 with a fresh install, after upgrading I installed Win8 drivers listed here. Now I have a problem with the CPU usage (it ...
4
votes
1answer
2k views

How can I tell Windows or Linux to put a specific (PCI[e]) device into sleep/off (D3) state?

How can I tell Windows or Linux to power a specific device (e.g. USB controller, network card, video card) down, that is put it in the D3 state? From the very little I know about ACPI and such, the ...
2
votes
1answer
2k views

Ubuntu 10.04 Keyboard and Mouse Freezing Problem

I had a partition setup with Windows XP and Ubuntu 8.04 dual booting. I recently upgraded to Ubuntu 10.04 by installing fresh from CD but leaving the previous /home folder as is. Things seemed to be ...
2
votes
1answer
1k views

Tool for making fn-x buttons work? Archlinux, handler.sh

This just seems like such a normal thing to work. I know that this works out of the box on Ubuntu. But not in Archlinux. I would like to think that there is a tool in existence that would use ...
1
vote
1answer
2k views

Gigabyte motherboard (890gpa-ud3h) won't shutdown USB power

what the thing the Gigabyte engineers were thinking about their BIOS? How to disable USB being powered while standby/off by button? If I do hard shutdown by button (not related to my another question ...