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Questions tagged [acpi]

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

Advanced Configuration and Power Interface (ACPI) is a standard developed by HP, Intel, Microsoft, Phoenix and Toshiba for configuration and power management computer. ACPI has a proposal to supplant the APM(Advanced Power Management), while the former puts the operating system to control power management, APM uses the BIOS for this. The implementation of ACPI depends not only software, but hardware support.

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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?
Seth Carnegie
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Is the CPU active in Sleep mode?

Suppose on a Windows OS, you toggle the computer to go into sleep mode and put it away. As far as I know there will no programs or processes will be running. But would the processor still be running or be active in background in some way and…
cpx
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What is acpitz-virtual?

lm-sensors gives the following output for this machine: acpitz-virtual-0 Adapter: Virtual device temp1: +60.0°C (crit = +105.0°C) temp2: +56.0°C (crit = +105.0°C) temp3: +35.3°C (crit =…
Corporal Touchy
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What do the power management tools in Linux do? (acpi, pm-utils, etc...)

I am really really confused about the power management tools available for Linux: I have Arch Linux with XFCE on my laptop. The guides on the the Arch Linux wiki list acpi acpid pm-utils cpufreq laptop-mode-tools to manage power, suspension,…
point618
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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 drains my battery), in Task Manager I can see…
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What is keeping my PC from sleeping?

How can I find out why my laptop or desktop won't automatically go to sleep
Omar Shahine
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What features does enabling ACPI 2.0 support in BIOS enable?

So I was booting up my box and for some odd reason my BIOS had lost settings (again), thus resetting everything to defaults. I was digging around making sure things were configured to my liking and noticed the option to enable ACPI 2.0 support. It…
glenneroo
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What does an ACPI BIOS configure during boot?

When a PC boots with an ACPI BIOS, what does it exactly do? I understand that the point of ACPI is to allow the OS to control hardware resources and power management but before the OS is loaded does ACPI configure just the devices needed to boot…
RJSmith92
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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 or by issuing shutdown -h now in a root terminal,…
Stacey Richards
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ACPI Exception: AE_NOT_FOUND, while evaluating GPE method - floods syslog

On my new desktop, after waking up from sleep one of my CPUs is constantly on 100% use, initially it was the xorg process (4289), now its the kworker thread. My /var/log/syslog is flooded (850+ lines / second) with this messages: Aug 26 17:10:55…
Angelo Fuchs
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will boot command params acpi=off or acpi=noirq ruin my hardware?

Dell xps 15z here. Really, really trying to install linux distro to dual boot from. first goto is bt. cant even get past 'initramfs live media filesystem not found' on usb boot. next was ubuntu, fedora..may try gentoo Im learning it is not a distro…
c card
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ACPI interrupts causes high CPU usage from kworker

I noticed that, on my ASUS N550JV, my load average was always above 1. I'm using Devuan Beowulf with a 4.19.0 kernel. After some digging I found that the culprit was a kworker related to ACPI. empire# pidstat 10 Linux 4.19.0-5-amd64 (empire) …
miniBill
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acpi not running action

I have a scripts to control display brightness: /etc/acpi/actions/bl_down.sh: #!/bin/sh bl_device=/sys/class/backlight/intel_backlight/brightness echo $(($(/usr/bin/cat $bl_device)-10)) | sudo /usr/bin/tee $bl_device Running it as ./bl_down.sh…
Slava Knyazev
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Laptop sleep: How to go into S3 easily?

Laptop: Fujitsu-Siemens Amilo Pi-3525 OS: Vista When my laptop is plugged in and I close the lid, it goes into S1 sleep. This means that there is still: fan noise (annoying when trying to sleep at night) lots of power consumed (so if I then unplug…
Stefan Monov
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Prevent poweroff on Debian when the physical power button is pressed

I'm on Debian-Lenny. I want to change the action taken by the system when the power button is pressed. How do I modify the system such that it does not power off when it gets an Power Button ACPI event? (My server is in my room, and I don't want my…
Jonathan Rioux
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