ACPI (Advanced Configuration and Power Interface) is a standard for power management.

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How to find what causes my notebook to crash?

I have a new notebook and it crashes frequently. $ uname -a Linux bpgergo-notebook 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No ...
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What's the difference between udev and acpi(d)

They both seem to be receiving & processing kernel events, so why do they both exist? From what I gather, ACPI seems to be more high-level compared to udev, but apart from that can't really tell. ...
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Why does my Debian desktop no longer power off when told to? [closed]

sudo poweroff and sudo shutdown -h now used to result in my machine entering the shutdown run level and powering down. These days the machine goes through the shutdown procedure but the power is ...
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1answer
18 views

How to disable suspend on close laptop lid on NixOS?

I'm using NixOS on a laptop and want to disable auto-suspension that happens every time I close the laptop lid. Approach described in “How to disable auto suspend when I close laptop lid?”, that is, ...
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1answer
13 views

linux / SMP — suspend immediately after wakeup from suspend

(Please note -- I read this post and it is not a duplicate.) So for years, my linux laptop has allowed me to both suspend to disk and (with a little effort) suspend to RAM with one of these two ...
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234 views

message at shutdown: watchdog did not stop!

At shutdown I often get the message watchdog did not stop! and then the laptop freezes after few other lines without shutting down. Any idea on how to fix this? Recently it happened very often, ...
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35 views

Thinkpad T440s suspends after some time without any user action

I'm using a Thinkpad T440s with an Linux Mint 17.2 system. The Thinkpad is docked in a Lenovo Docking station. Today I had for the first time several suspends of my system while working as usual... I ...
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1answer
46 views

Possible race condition when scripting headphone plug-in event

I'm currently trying to script the headphone plug-in/out event. I found out that I can script this quite easily as an acpi event.. I created a file in /etc/acpi/events/ with the event event=jack[ ...
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23 views

My computer only boots at acpi=off for any linux distro,what should i do?

I think booting with this parameter won't affect my laptop but it disables wifi by hardware switch and may be my laptop will not hibernate. please help me fixing this problem ,I know this is a common ...
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1answer
55 views

why does Linux only boot on my computer when I add pci=noacpi in grub? Must I replace my laptop? Is it serious enough?

I have tried Ubuntu and Linux Mint and both of them only boot when acpi=off or pci=noacpi. What is this irq and pci scannning ? Someone told me to replace my laptop (it is in warranty period). I am ...
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249 views

Disable GPE ACPI interrupts on boot?

If I look for ACPI interrupts, I find: /sys/firmware/acpi/interrupts/sci: 55414 /sys/firmware/acpi/interrupts/error: 0 /sys/firmware/acpi/interrupts/gpe00: 0 invalid ...
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2answers
66 views

ACPI wakeup 4-letters code meaning?

I have to disable some event to avoid an immediate wakeup after suspend in my desktop machine, and I made it by trial and error (works well, so that is not a problem). But I wonder... for example in ...
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1answer
91 views

System does not poweroff - how to diagnose

After upgrading to debian jessie my dated desktop system no longer powers off reliably (/sbin/poweroff - via systemctl on tty1). Instead, it shuts down, pauses and reboots and only powers off if I ...
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39 views

issues with acpi-cpufreq and frequency scaling

I am using the Ubuntu distribution on Intel(R) Core(TM) i7-2760QM CPU @ 2.40GHz with Kernel version: 3.14.5. I deactivated the intel_pstate driver and activated the acpi-cpufreq driver with userspace ...
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53 views

Suspending fails when a USB mouse is connected

When I try to suspend my Ubuntu 14.04 (with KDE environment) using sudo pm-suspend it fails unless I disconnect USB devices, e.g. USB mice and flash drives. Is there a way to solve this problem? ...
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82 views

Can't adjust screen brightness on ThinkPad W530

I can't adjust screen brightness using keyboard (Fn+F8 and Fn+F9) on ThinkPad W530 when I'm using integrated graphics card. When I switch back (in BIOS) to Discrete graphics card, which is Nvidia ...
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165 views

Laptop wireless not working following Linux install

I have an HP ProBook 4740s which came installed with Windows 7. I recently installed Linux Mint 17.2 on the laptop. Im not dual booting, the laptop now only has Mint on it. Since the installation, ...
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18 views

How to handle a key which is not detected by ACPI [duplicate]

I have the Asus R556LB laptop. Some functional keys (e.g. the ones for brightness regulation) did not work out of the box, so I visited this page. Unfortunately, the keys I wanted to work are not ...
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1answer
78 views

What do the parts of an acpi event mean?

I have a ThinkPad laptop with dual batteries, and I want to write an indicator app for GNOME which performs an action when the external battery is plugged/unplugged. To read these events I connect to ...
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0answers
293 views

How to debug ACPI/poweroff problems?

I recently replaced my hard drive with a Sandisk SSD and did a fresh install of Fedora 21 (previously using F20). Now my laptop won't power off, and I'm not sure which of the two is causing the ...
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1answer
153 views

ACPI – how to select correct LED and LCD module

I'm facing a strange issue. I have ASUS x551ma notebook; As I can get it, after a while (20-30 min) watching LCD, I suffer eye strain. The graphics (video card) seems fine but the LED is micro-shaking ...
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1answer
419 views

Battery indicator problems after installing and uninstalling kubuntu-desktop package on Xubuntu 15.04 x64

A few weeks ago, I decided to get adventurous and install different interfaces on my Lenovo T420 running Xubuntu. I decided to jettison Kubuntu after trying it out (just not my style) and kept Xubuntu ...
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114 views

Is my MacBook Air sleeping under Debian Jessie?

I frequently notice the Apple logo lights up relatively briefly when the lid is closed on my MacBook Air running Debian Jessie. If I suspend with the lid open then the lock screen briefly appears and ...
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45 views

Unable to prevent keypresses from unsuspending laptop

It appears that due to the poor build of my laptop, keys sometimes get pressed in my backpack, even though the lid is closed. This causes it to silently resume from sleep, then overheat and drain the ...
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1answer
101 views

What's the relation betwen ACPI, udev, HAL and pm-utils

I'm trying to figure out how the power management in achieved in Linux (because I want to fix some issues in my laptop). I have found thoughtful documentation about these elements separately. In other ...
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1answer
250 views

Linux boot hangs: [Firmware bug] ACPI: No _BQC method, cannot determine initial brightness

I have an old Win XP NEC laptop and I tried to boot a live usb with Lubuntu 14.10 to install Lubuntu, but when I tried to boot the live USB, after about a minute the boot process hangs at a line that ...
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1answer
159 views

USB keyboard is disconecting automatically (without being unplugged)

In my log, I see following message: kernel: usb 1-1.6: USB disconnect, device number 5 acpid: input device has been disconnected, fd 7 acpid: input device has been disconnected, fd 8 I have not ...
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1answer
338 views

Configure power button to shutdown on Debian/Mac Mini G4

I use Debian/PPC on an old Mac Mini G4, it currently serve as a DLNA server (UPnP), no mouse or keyboard plugged. I would like that my power button also serves to shutdown the box. Currently it does ...
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1answer
182 views

What does “acpi PNP0501:00: Still not present” mean?

On my new laptop, I have an error in dmesg which occurs every 2 seconds: acpi PNP0501:00: Still not present What does this mean? How to troubleshoot it?
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2answers
336 views

What does the change of the clocksource influence?

The output of cat /sys/devices/system/clocksource/clocksource0/available_clocksource lists the available hardware clocks. I have changed the clocks, without any visible difference. sudo /bin/sh -c ...
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470 views

acpi_listen: can't open socket /var/run/acpid.socket: No such file or directory

I need to use the acpi_listen command. It wasn't installed so I did: pacman -S acpid Then when I run the command acpi_listen I get: acpi_listen: can't open socket /var/run/acpid.socket: No such ...
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1answer
3k views

CentOS 7 cpupower not setting the CPU's to maximum

On my machine, i have power savings disable on the BIOS. When I run Ubuntu on this machine, the CPU's are running maximum at 2100 MHz. However, when I'm running CentOS 7, even with the scaling ...
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1answer
747 views

Fedora 20 ACPI issues on black screen before log on

I installed Fedora 20 64-bit with the standard Gnome3 desktop environment and while booting a black screen is displayed with 4 messages in the following form: Failed to find handle for ACPI object ...
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2answers
2k views

Graceful shutdown via power button

I want to be able to shutdown my CentOS 7 machine by pressing the power button. Since it doesn't work out of the box, I tried the following: yum -y install acpid service acpid start chkconfig acpid ...
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22 views

skip pam_fprintd.so with closed lid

I really love fprintd and I really love having my laptop closed while in docking station. But I hate both together. This is my /etc/pam.d/system-auth: auth sufficient pam_fprintd.so ...
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1answer
1k views

xfce4-power-manager not updating; ACPI finding an unknown battery but working fine?

I recently upgraded my Asus S56CA Ultrabook and unfortunately my battery indicator in xfce4 stopped working. I am running Debian 8 (Jessie). uname -a gives me this: Linux 3.14-2-amd64 #1 SMP Debian ...
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1answer
1k views

Disabling screen blanking in GNOME 3

We are using a Debian 7 machine with the default GNOME 3 installation to display content on an information display. This display needs to remain on until the connected computer is switched off. ...
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138 views

Acpitool no information

When I run as root acpitool I recieved Battery is not present, bailing out. AC adapter : <info not available> Thermal info : <not available> I can understand why all the ...
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1answer
1k views

Changing systemd HandleLidSwitch setting during run-time?

The setting HandleLidSwitch is defined in /etc/systemd/logind.conf as follows: HandleLidSwitch=<hibernate,ignore,...> The setting is applied successfully on boot. However, I would like to ...
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624 views

How can one make a laptop remain pingable and continue running its daemons even after the lid is closed?

I'm running Ubuntu 12.04 server on a laptop, and I'm pinging it from another machine. Whenever I close the lid, the pings stop getting responses, and when I open it again, they resume receiving them. ...
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1answer
5k views

How to change Power button shutdown action

I use Mageia ver 4 Linux as server, without X started and without any user login-in during normal operation. This PC has a special card for measuring and control of other devices. This card has its ...
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2answers
19k views

Why does Linux have poor battery life by default compared to Windows?

Is there something inherent to Linux operating systems that makes them poor managers of battery power by default? I would have thought a light distro like Lubuntu would have a clear battery life ...
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1answer
6k views

How to check if my battery is healthy?

My Lenovo ThinkPad T61 is rather old, and a couple of years ago I had to replace the battery as the old one was dead. Now the replacement battery seems like dying a slow death, but I get conflicting ...
4
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1answer
6k views

What do the kernel parameters acpi_osi=linux and acpi_backlight=vendor do?

I had troubles with the screen brightness control in my laptop and I fixed it by adding the acpi_osi=linux and acpi_backlight=vendorparameters to the filegrub.cfg. I'd like to know what these ...
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2k views

Bash script to adjust brightness when battery unplugged

I am trying to set up my system and to get some practice with scripting and the like. I am running Linux Mint 16 on a Samsung RC520 laptop (Linux 3.11.0-12-generic x86_64). I want to implement a ...
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1answer
2k views

Intel Turbo Boost apparently activated for no reason?

The other day, I reinstalled my operating system (Crunchbang, fork of Debian). For some reason my fan has been running at full speed (and blowing colder-than-room-temperature air) even though I'm ...
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647 views

Is there any way to get Intel i915 graphics without ACPI?

I've got an old tablet PC that panics on boot with ACPI GPE storms. It boots just fine with acpi=off in the kernel arguments, however I've never been able to get the Intel i915 accelerated graphics ...
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1answer
3k views

command to reboot as non-root user

I am using LXDE on Debian. When logged in LXDE as user, I can click on the logout icon in the menu and choose one of the options: shutdown reboot logout suspend But when I type reboot or shutdown ...
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3answers
747 views

Battery full notification

I am using a Linux distribution, I didn't get any notification even after the battery is full. Is there any custom script to run battery charge status and output a sound notification when the ...
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1answer
585 views

ACPId suspend-to-ram: can you specify waking up using keyboard events?

This is Gentoo Linux with OpenRC (updated to systemd later on), and ACPI + some power management features in the kernel for Intel. ACPId is up and running. I can suspend to ram using: echo -n "mem" ...