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

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How to read CPU temperature on a shared server?

I would like to read my CPU temperature with PHP, but I cannot find the relevant info. All paths under /proc/acpi/thermal_zone appear empty. I have tried: /proc/acpi/thermal_zone/THM0/temperature ...
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1k 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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46 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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421 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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957 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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835 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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441 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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571 views

The brightness on my Lenovo SL510 only moves between 100% and 0%?

I have a Lenovo SL510 laptop running Linux Mint Debian Edition (based on Debian Testing) using the Cinnamon DE, and the brightness appears to only have two settings: 100% and 0%. If I use the ...
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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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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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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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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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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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431 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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issues booting Ubuntu [Firmware Bug ] : ACPI _BQC method, cannot determine initial brightness

I am running into an issue booting Linux on a new machine. I started with Ubuntu Server edition. I completed the initial setup via an ISO image, however when the machine restarted and went to load ...
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Cannot control brightness with Fedora 14 on Compaq CQ42

I've done the primary searching of similar questions, Found some, tried the solutions and they didn't work for me. So asking again. All the keys of my Fn combination works except the brightness ones. ...
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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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946 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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424 views

acpid - Hibernate When Unplugged

I'm new to programming for Linux (lubuntu specifically) and I'm working on a project to get an old, discarded laptop up and running the way I want it. I have acpi and acpid installed, and when I run ...
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Where to find acpi mailing list?

Was this mailing list dead: Acpi-devel -- Defunct ACPI Development Discussion List What other source can I utilize , just want to find the developers of acpid
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17 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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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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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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234 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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Suspend-to-ram fails on Gentoo with i915

I am struggling with suspend-to-ram on my Acer Aspire V3 772G with Gentoo. My configuration: Gentoo 3.12.5 kernel (.config) /etc/portage/make.conf Portage world file 1) It works in Windows 7 and ...
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“Acpi-State” in slabtop's output gets increased — what is it? Is it a bug?

Since boot it gets increased occupying even more RAM than anything else: Active / Total Objects (% used) : 680608 / 719176 (94.6%) Active / Total Slabs (% used) : 17390 / 17390 (100.0%) ...