Questions tagged [acpi]
Advanced Configuration and Power Interface, a standard for power management in operating systems.
183
questions
509
votes
7
answers
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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?
44
votes
5
answers
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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 ...
24
votes
1
answer
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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
...
24
votes
1
answer
39k
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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) ...
22
votes
2
answers
23k
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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 ...
20
votes
6
answers
30k
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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
11
votes
4
answers
76k
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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 ...
10
votes
1
answer
14k
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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 ...
8
votes
3
answers
21k
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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 ...
8
votes
3
answers
4k
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 ...
8
votes
1
answer
4k
views
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.
...
7
votes
2
answers
4k
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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, ...
7
votes
1
answer
1k
views
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/...
7
votes
2
answers
1k
views
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 ...
6
votes
5
answers
14k
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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 ...
6
votes
3
answers
8k
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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 ...
6
votes
3
answers
5k
views
Keyboard doesn't work after Windows resume from sleep (S3) -- how to fix?
I have a weird issue with my keyboard after resuming from S3 sleep: I can type perfectly for maybe 5 seconds, but afterwards the keyboard ceases to work until I hibernate or restart (or sleep again -- ...
5
votes
3
answers
16k
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How can I manually control a fan from the terminal?
I'm trying to control the fan speed on my desktop, and I'd appreciate your help.
Goal: Use a script to control the fan speed on my computer.
Motivation: The embedded BIOS "Smart Fan" settings isn't ...
5
votes
1
answer
8k
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 ...
5
votes
3
answers
3k
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Skip all warning prompts on ACPI shutdown?
When I issue an ACPI shutdown command to a Windows XP guest machine from the host VM server, I want Windows to shutdown.
The problem is, Windows always wants to ask some question or another, rather ...
5
votes
4
answers
1k
views
How can I convince Windows 7 to reboot upon hibernating rather than powering down?
I have a Linux and Windows 7 dual-boot setup on my PC and I would like to configure the OSes so that when working in one OS, I can hibernate (saving the state to disk), reboot, use the other OS, ...
5
votes
3
answers
7k
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Windows 10: Laptop display refuses to turn off
System: Clevo P157SM (Sager NP8255-S).
I've just upgraded to Windows 10 Pro on my laptop and now the display refuses to turn off even if I lock the session or after the configured timeout (15 minutes ...
4
votes
7
answers
50k
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missing battery time remaining estimation
I am examining a new Surface Book 2 and missing the battery time remaining estimation.
On a Surface Pro 4 it behaves as expected and I try to check the differences.
If you google it, there are many ...
4
votes
6
answers
18k
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Suspended Laptop Cannot Wake Up - Ubuntu
I've got an ASUS G73JH, and whenever I suspend it or hibernate it, it will not wake up. The screen stays backlight but is black. The fan remains running, however the HDD does not, not disk activity is ...
4
votes
3
answers
572
views
What circuitry displays battery status in laptops
Which circuitry in laptop is responsible for showing the battery status/charging etc in a laptop? My intension is to hack such a circuit inch a desktop to show the status of a standalone UPS.
I am ...
4
votes
1
answer
3k
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How can I convince my ASUS EEE B202 to boot, when the power is returned to its power supply
My little home server 'sulks', when it loses power. Instead of booting, when the power is returned, it waits for me to press its power-button.
Is there a way to have it boot without human interaction?...
4
votes
1
answer
2k
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Linux Drastically Underclocking CPU (i5-4300U CPU)
Currently working on an issue and am looking for some guidance.
Our current setup is a dual core (i5-4300U) Advantech box running Ubuntu 14.04.
I am seeing these rare occasions where the CPU cores go ...
4
votes
1
answer
696
views
Determining Namespaces Not in the ACPI Spec
I am trying to determine how it may be possible to find documentation for namespaces that are not documented in the ACPI spec. I have an Asus uEFI BIOS v(3202) and I'm receiving kernel messages ...
4
votes
1
answer
2k
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Difference between suspend to "mem" and pm-suspend
What is the difference between
echo "mem" > /sys/power/state
and
pm-suspend
Both can put the computer to sleep mode. I want to execute a script automatically when the system resumes from sleep. ...
4
votes
1
answer
5k
views
Windows 7 does not 'wake up' from Sleep mode
I'm new to Windows 7, so I don't know if this is normal.
When the computer is idle for 30 minutes, the screen goes black and no key pressing or mouse movement will bring the computer out of standby. ...
4
votes
1
answer
2k
views
"Bios Not fully ACPI compatible"
Why would a computer that has been working for month's suddenly start having a "Bios not fully ACPI compatible" blue screen error, when the bios has not changed?
4
votes
1
answer
180
views
Estimated power draw for different power states?
What would be a raw estimate of the power draw of a semi-modern desktop PC, in different sleep states? Will the suspended state (with powered RAM) draw much more power then the PC in hibernation (...
4
votes
2
answers
3k
views
Sleep mode no longer works after the Windows 10 Fall Creators Update
Last week I've updated my PC with the latest Windows 10 Fall Creators Update. Since then, I cannot longer use a sleep mode on the PC - when I try to put the PC to sleep, it doesn't go to sleep but to ...
4
votes
0
answers
262
views
Need noacpi in CentOS 6.4, not in RHEL 6.4
I've been trying to fix a rather odd problem that I've seen on our new Dell R5500 (Xeon based workstations).
We want to run CentOS 6.4 64 bit on them. We did a base install which worked fine, however ...
3
votes
3
answers
4k
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Linux program to artificially create CPU usage
Since I own one of those Centrino based Core 2 notebooks that create annoying buzzing noises when idle (= entering C3 or C4 power saving states), I'm looking for a program that creates artificial CPU ...
3
votes
1
answer
10k
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Unable to install ubuntu - ACPI PCC probe failed
I recently bought a new computer. The first OS I installed was windows 8.1. After that I created a bootable usb drive with ubuntu 14. Unfortunatelly every time i try to boot it and install it i have ...
3
votes
1
answer
14k
views
How do I make ESXi 5.0 to shutdown virtual machines when the physical power button is pushed?
I have a home NAS/DLNA server built out of an HP Micro Server with the HP branded VMware ESXi 5.0.0 build-623860 (free license) installed. Being a home media center I'd like it to be "manageable" by ...
3
votes
1
answer
10k
views
Is my computer in ACPI S3 mode?
I recently got a new motherboard for my Intel Core 2 Quad 9300-based PC (the old motherboard was fried). The old motherboard was an ASUS IP35 Pro, while the new one is a Gigabyte G41MT-S2.
Since the ...
3
votes
1
answer
32k
views
BIOS not ACPI compliant, on windows 7 installation
I was facing a problem of blank screen with cursor after login in my Lenovo G40-30 laptop which was pre-installed with windows 8. So to resolve it I somehow decided to change it from UEFI boot to ...
3
votes
4
answers
18k
views
Disabling System Interrupts in Windows 7 - (high CPU usage, semi solved)
I know the system interrupts topic is pretty common with varying solutions but I had a question about how to implement a solution in Windows 7 the way I did in Ubuntu 12.04.
Background:
Bought an ...
3
votes
1
answer
250
views
ACPI : how risky is that to try methods
I don't know a lot about hardware. I've got a Yoga Slim 7 and the Performance settings can't be set for know from Linux. I've disassembled the DSDT tables to look at even if I don't understand ...
3
votes
1
answer
875
views
Windows 7 Wakeup from Sleep then Shutdown
Is this caused by low battery? I have an Asus UX31A, and I left it unattended. As usual, in 5 minutes, it went to sleep mode with the lid still open. I came back a couple hours later, and I noticed ...
3
votes
3
answers
940
views
New HP Mini 2140 netbook battery wrongly reports 40% wear after 2 months of usage
I'm using an HP Mini 2140 with Ubuntu 12.04 installed on it. Two months ago, due to the fact that my old battery lasted only for about 20-30 minutes, I bought a new battery, which reported a capacity ...
3
votes
0
answers
125
views
Laptop always turns itself on again
Since yesterday my Laptop won't turn off anymore. When I shut it down, it takes a few seconds and then it turns itself on again. Doesn't matter if I let it boot and shutdown again, or turn it of in ...
3
votes
0
answers
722
views
How to prevent keyboard from turning off, when closing laptop lid in Linux
I have a Lenovo ThinkPad X201 Tablet with buttons on the screen bezel. These buttons are there to rotate or invert the display in Linux (Ubuntu 20.04) or lock the screen. Currently I have successfully ...
3
votes
1
answer
709
views
ACPI_BIOS_ERROR with Windows 10 Installation Media
I have been experiencing some issues on Arch such as the WiFi part of RTL8723BS not working, and the power button not working. I have narrowed it down to the BIOS, so I am trying to flash it. ...
3
votes
2
answers
54k
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The BIOS in this system is not fully ACPI compliant
I have a Dell Inspiron 3050 desktop (one of the little mini square PCs) which I'm trying to put some version of Windows on.
I'm able to load various Linux flavors, but when I try Windows, I get a ...
3
votes
0
answers
6k
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Latency caused by ACPI.sys
(Specs below)
A few weeks ago, I started having problems with latency; all of a sudden audio and video weren't synchronised anymore and there were/was a lot of stutters and crackling (EDIT: my CPU ...
2
votes
1
answer
27k
views
Unable to install windows 7 on Asus X553M
I bought a new ASUS X553M laptop with DOS pre-installed, I am trying to install windows 7 but getting error "The BIOS in this system is not fully ACPI compliant. STOP : 0x000000A5"
Please help.
2
votes
3
answers
5k
views
Want to throttle CPU on Windows 7 desktop, but it is ignoring Max CPU setting in Power Options
I want to be able to substantially throttle down the CPU on my desktop, which due to space constraints is in our bedroom and the wife is suspending it each night because of the fan noise.
I've tried ...