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

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1answer
428 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
3k 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, ...
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 ...
1
vote
1answer
1k 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
866 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 ...
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0answers
2k 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) ...
12
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1answer
6k 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 ...
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 ...
1
vote
4answers
93 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 ...
368
votes
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?
4
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3answers
543 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
220 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
660 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 ...
5
votes
3answers
32k 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 ...
4
votes
4answers
5k 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
744 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
158 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
774 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 ...
0
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0answers
899 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 ...
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1answer
1k 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
251 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 ...
1
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1answer
1k 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 ...
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2answers
5k 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 ...
2
votes
3answers
2k views

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 ...
1
vote
1answer
1k views

How can I manually generate a fake ACPI lid event from a script in linux?

I'm trying to make sure that my laptop will suspend if I unplug it after the lid is already closed, and I believe that one way to accomplish this would be to simulate an ACPI lid event when the power ...
2
votes
2answers
1k views

Laptop abruptly powers off after few seconds of booting

I have a 3 year old HP Pavilion dv2208 laptop. Recently it started abruptly powering off in like ~20-30 seconds into Windows boot sequence after almost every reboot/shutdown. Even if I leave it in ...
2
votes
1answer
606 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?
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6answers
9k views

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 ...
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 ...
4
votes
1answer
1k views

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 ...
1
vote
1answer
272 views

How do you stop Linux from re-setting the display brightness?

After manually setting the display brightness on my laptop, the system re-sets the value. If the laptop is plugged in, the value is set to full brightness; if it is not plugged in, it is set to ...
1
vote
1answer
234 views

What information is present in the ACPI tables?

What do ACPI tables contain? I tried googling it, and it did not help.
5
votes
3answers
3k 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 -- ...
7
votes
2answers
664 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 ...
2
votes
1answer
1k views

How to view ACPI RTC alarms?

My PC resumes at 8:30 when it's in standby mode, and I would like to check if there is an RTC alarm that causes it. How can I view currently set alarms in Windows?
0
votes
1answer
163 views

System will only boot into a Live CD with core disabled in BIOS and ACPI off

I have a system that was running a Q6600 and Windows 7 RC. It crashed last night into a BSOD with a MACHINE_CHECK_EXCEPTION. Now it does that every time it boots into Windows. I tried using my ...
2
votes
1answer
218 views

Power states in Windows

Does anybody know or have a link to documentation on how the Power Manager of Windows, determines to go to the ACPI power states S1-S4? Are there any settings that can be configured? I know that by ...
0
votes
1answer
1k views

ACPI Throttling in Ubuntu

I'm looking to throttle my cpu through the ACPI. I've read up on it, but I keep receiving permission denied statements. I have 8 available throttling states. Here are the outcomes of my atttempts: ...
0
votes
1answer
322 views

S3 standby/resume in PCLinuxOS on a desktop PC?

I've just installed PCLinuxOS on a regular desktop PC. It's working fine except for S3 standby/resume (I'm not interested in S4 hibernate). What packages do I need to install, and what settings to I ...
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 ...
0
votes
1answer
2k views

What impact could it have to set acpi=off during Ubuntu installation?

I've had a hard time getting Ubuntu installed on my Acer laptop. This guy recommended setting acpi=off to workaround some of the boot issues. If this solution is successful in getting Ubuntu to boot ...
3
votes
3answers
275 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 ...
15
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4answers
9k views

What is keeping my PC from sleeping?

How can I find out why my laptop or desktop won't automatically go to sleep