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

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7
votes
2answers
11k 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 ...
0
votes
0answers
727 views

High Interrupt DCP processor take

I have a quad core laptop with win7. Around 3 months ago the laptop occasionally slowed down. Resource Monitor and Process Explorer show that processor 0 was 100% busy with DCP and Interrupts. A ...
0
votes
0answers
285 views

I closed the lid and the screen is black (win8)

I have win 8 . And i have closed the lid from power management's or power option I think that was the name from win 8 not bios The lid was his option sleep and change it to do nothing THE power ...
2
votes
0answers
605 views

Is it possible to install Windows 8 on a non-ACPI computer?

I have a computer with a BIOS that doesn´t support ACPI. I tried to install Windows 8 but the setup said I cannot install Windows 8 without ACPI. After some research I found out that this is since ...
0
votes
1answer
903 views

Exit stand-by only when power button is pressed

I was wondering if there is any setting to make my PC exit stand-by only when the power button is pressed on my computer case? My laptop does this out of the box, it won't exit stand-by on any other ...
0
votes
1answer
522 views

Topic: Load custom DSDT @ windows 7?

I've extracted my BIOS DSDT, disassembled it to ASL, fixed, compiled it back to AML, and how can I make windows to load it instead of my BIOS DSDT? Do I need to write driver or could it be done via ...
0
votes
1answer
652 views

Screen stays on when laptop lid shut, running centos 6.3

I'm running Centos 6.3 on a Dell laptop, I'm not running a graphical desktop - just text mode. When I shut the laptop lid the display remains active with the backlight on, whereas I'm expecting it ...
2
votes
0answers
448 views

Acer Aspire Laptop won't charge in Windows 7 Home Premium x64

I have an Acer Aspire 7750-6801 laptop running Windows 7 Home Premium 64 bit OS. The issue is that it will only charge sometimes when plugged in. I thought it might be a hardware issue, so I tried ...
1
vote
0answers
229 views

ACPI events delayed or not logged in Linux

I have a samsung ultrabook (NP530U3C) that is not working good with ACPI events: lot of ACPI events randomly stop to be logged on kernel messages either in acpid logging. the lid closing is ever ...
3
votes
1answer
630 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
3answers
836 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 ...
5
votes
3answers
7k views

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 ...
2
votes
0answers
827 views

Samsung NP530 CPU stuck at 55 C temperature

I have run into heating issues on my ultrabook running Linux. Idling temperature for Win7 is ~45 C, while in Linux it is ~55 C. Output of sensors rohit@raijin ~ $ sensors acpitz-virtual-0 Adapter: ...
1
vote
2answers
659 views

How to sigstop/sigcont processes based on CPU temparature?

I'm temporarily forced to work on a laptop whose fan has failed. Under light load it works fine, but as soon as I start computationally intensive jobs, the temperature raises very significantly, even ...
1
vote
2answers
870 views

Auto-start computer from shut down state

Is there any way to start a computer at scheduled time when it is Shut down. I know how to start it when it has been put into Hibernation.
3
votes
1answer
289 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 ...
2
votes
1answer
11k 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 ...
0
votes
1answer
1k views

How do I pause and restart VirtualBox virtual machines on ACPI suspend?

I use VirtualBox to set up Web developer environments on my laptop. If I suspend the computer and then restart, I'll get very long startup times while VirtualBox spins back up. I have much less of a ...
3
votes
1answer
5k 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 ...
0
votes
0answers
1k views

Linux can't boot without acpi=off on Thinkpad

I recently installed Linux Mint 12 - the Gnome version - on a new Lenovo Thinkpad L520 for a friend. It's running kernel 3.0.0-12- generic. When I booted - either into the live CD, or into the ...
4
votes
3answers
2k views

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 ...
4
votes
1answer
128 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 (...
3
votes
1answer
1k views

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 ...
0
votes
1answer
493 views

Fedora 16 wakes on mouse - how to prevent this?

I have a desktop computer with PS/2 (!) keyboard and mouse, running Fedora 16, just recently installed. It goes to sleep OK, but moving the mouse wakes it up. I'd like moving the mouse not to wake ...
4
votes
1answer
4k 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. ...
5
votes
1answer
1k views

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, ...
4
votes
3answers
4k 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 ...
3
votes
2answers
2k 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 ...
0
votes
1answer
1k views

How to support GNU/Linux on lenovo g470 laptop ? fans, mic, sdcard etc

I recently got a lenovo g470 I use it under GNU/Linux debian and update my notes at : http://rzr.online.fr/q/lenovo Maybe it's a too recent model to get support, but I bet this is also affecting ...
4
votes
0answers
3k views

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) ...
16
votes
1answer
9k views

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 ...
5
votes
1answer
3k 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 ...
1
vote
4answers
95 views

repeatedly power on/off server or letting it run through

I run a PC at home that I want to access from remote when I am travelling. The minimum requirement is that I can access it once every day (if I can access it more often the better of course). I can ...
2
votes
2answers
2k views

Ubuntu 11.04, CPU Throttling Works In Reverse?

I've got an HP EliteBook 8530p. I have run prior versions of Ubuntu on this machine, but I've recently formatted and put 11.04 on it. No matter what I try, the CPU throttling goes in reverse - when ...
424
votes
7answers
34k 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?
4
votes
3answers
723 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, ...
0
votes
1answer
230 views

using ACPI in terminal

I'm running Centos on my home laptop just to play around with, I ACPID running which is letting g-p-m get the battery information but I want to find out battery information over ssh and acpi doesn't ...
0
votes
1answer
874 views

How to disable automatic power-off on linux?

I need to disable the automatic power-off on shutdown so I can just withdraw the power myself. The reason for this is that the machine should power on itself when it gets power (which is accomplished ...
7
votes
3answers
47k views

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 ...
5
votes
4answers
7k views

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 ...
1
vote
1answer
772 views

How to set Laptop Brightness in Gnome and /proc on Thinkpad W510?

I can set the brightness of my laptop screen already via /proc. I can read and change the value. Now I've set the value to 33 and then I went into gnome power management and enabled the option that ...
2
votes
1answer
161 views

Linux PC randomly halts [instant power off] and doesn't power back on power switch unless AC power is cut

my Linux pc is randomly powering off. the working configuration: ATI drivers (fglrx) not loaded cpufreq governor (either performance or powersave) and frequency are set at boot (default settings ...
2
votes
2answers
830 views

Why does installing Snow Leopard on a x86 machine require patching the DSDT?

I have seen various articles that describe how to install various versions of MacOs on x86 laptops from HP, Dell, etc. Many of them refer to a need to patch the DSDT, and even recommend a gui DSDT ...
1
vote
0answers
1k views

How do I understand or interpret the information in an ACPI .asl file?

Dumping the contents of the Windows Registry, located at HKLM\HARDWARE\ACPI\DSDT , I can get the DSDT, which I believe is the Differentiated System Description Table. More information about what a ...
0
votes
1answer
2k views

ACPI disabled from BIOS causes a restart loop

I tried to disable the ACPI feature from BIOS, but it seems the machine enters a restart loop after I do that. It always restarts itself right before the system boot begins. Any ideas?
1
vote
1answer
304 views

ACPI vs Gnome-Power-Manager

I ran acpi on the terminal and it said 20 mins before the battery is fully charged. But gnome-poower-manager applet says 40mins. Which one is a better estimate?
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 ...
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
2k views

Invalid ACPI : Invalid PBLK length [5] during Debian boot

I installed Debian 5.03 Lenny successfully on my machine. I got this error during boot: ACPI : invalid PBLK length [5]. After that the Operating System boots properly and starts normally. What ...
1
vote
2answers
6k views

Is it possible to disable ACPI Suspend in Windows XP?

Is it possible to disable ACPI Suspend in Windows XP? I don't mean the "Control Panel, Power Settings,..., choose never to sleep, actions on button, choose 'ask me', actions on close lid, choose 'no ...