Questions that relate to the Advanced Configuration and Power Interface (ACPI) specification which provides an open standard for device configuration and power management by the operating system.

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23
votes
2answers
47k views

Boot Error - ACPI PCC Probe Failed

ACPI PCC Probe Failed is the error that pops up instead of the default GRUB loader after I updated my kernel to 3.19. I searched around and couldn't find much information except that it is a known ...
11
votes
2answers
7k views

Fan is always on, CPU usage is rather low and can't find the fan or thermal_zone proc files

I have an Asus N76VB notebook with Ubuntu 14.04 and TLP for power managment. However, the fan is always on. It's not really loud, but it's annoying. My CPU usage is around 1-2%. It's clocked at 1.20 ...
32
votes
3answers
54k views

What does the kernel boot parameter “set acpi_osi=Linux” do?

I am facing an issue with brightness control in my laptop which has Intel HD graphics and Ubuntu 10.10 64-bit. So when I searched for a fix I found that a common suggestion is to edit the GRUB file ...
2
votes
2answers
37k views

How do I disable ACPI when booting?

When I tried to install Ubuntu from the live CD start menu, the screen became black with just a blinking cursor. I rebooted the PC and I chose the option acpi=off. Then the installer started and ...
10
votes
1answer
14k views

Not been able to Shut Down 13.04

After installing Ubuntu 13.04 (not upgrading to it, I did a "clean install" removing the older one), I'm not been able to shutdown the system. After clicking the Shut Down button the desktop ...
14
votes
3answers
31k views

What do the different Boot Options mean? (i.e. acpi=off, noapic, nolapic, etc)

I've been having issues installing 11.04 on my new laptop, the solution was to enable any of these boot options: acpi=off noapic nolapic But, what do these options actually do? What sort of ...
6
votes
5answers
5k views

Battery indicator is stuck on “estimating”?

After installing Ubuntu 10.10, the battery indicator worked fine (both percent remaining and estimation on time). I then installed and configured some software (Skype, Pidgin, Thunderbird, removed ...
4
votes
2answers
11k views

No ACPI support for my PC, what can I do?

On my new PC something is wrong with ACPI support under Linux. I have to boot it with acpi=off and nolapic. Also it detects only one CPU core (this annoys me the most) and won't shut down completely, ...
1
vote
2answers
4k views

Unable to adjust screen brightness on Gateway NV54

i have ubuntu 11.10 installed on gateway nv54. I want to install drivers for video card because the Screen brightness not changing.. But "Additional Drivers" not detecting anything. Graphics: Mobile ...
3
votes
3answers
4k views

“On battery” is not recognized

I have just bought a lovely ThinkPad Edge 11 which have ~6 hours of surfing in Windows 7. But unfortunately, a clean Ubuntu 10.10 give me max 4 hours which is not satisfactorily. Therefore I have ...
5
votes
3answers
4k views

How to enable hard-blocked bluetooth in Thinkpad Edge 320

I'm trying to use the built-in bluetooth device of my Lenovo Thinkpad E320. It seems to be hard blocked, but i can't find any possibility to unblock it. rfkill list returns: 0: tpacpi_bluetooth_sw: ...
3
votes
2answers
7k views

How to prevent the Power button to shutdown directly the system?

I did a fresh install of Ubuntu 13.10. When I press my power button, my computer immediately shuts down. In Ubuntu 13.04 I got a nice menu, where I could choose what to do. It is gone now and I want ...
0
votes
2answers
6k views

HP Pavilion G6 1209 temperature higher than usual and fan working in 11.10

Installing Ubuntu on this new machine i had various problems, so I asked around ask ubuntu for a solution. This is the latest one! :D When I start the pc it shows the temperature around 50-55. When I ...
0
votes
2answers
1k views

Start problem in ubuntu 15.04

I have this problem with my pc: [ 0.545187]ACPI PCC PROBE FAILED. STARTING VERSION 219 [ 240.096017] INFO: task systemd-udev:376 blocked for more than 120 seconds. [ 240.096060] Not tainted ...
3
votes
3answers
5k views

Sound system is eating away the battery

In my laptop the sound code is running at 100% even when I am not playing anything. It is causing my palm rest to hit significantly. While I do not face the issue on windows machine where I am using ...
8
votes
1answer
1k views

How does my computer suspend?

Trying to understand how suspend works in 10.10. http://git.webconverger.org/?p=home.git;a=blob;f=.bashrc;h=8ba57b877e31a03c5f0b1675b42f747d81dd31ad;hb=HEAD#l31 I use an alias suspend='sudo ...
4
votes
2answers
1k views

What does “ACPI PPC Probe failed Starting version 219 ” mean exactly?

I've recently installed Xubuntu 15.04 on my desktop The video playback was kinda slow and buggy so I installed the nvidia drivers (the gpu is an onboard 7025) As some people, I get the "ACPI PPC ...
1
vote
1answer
275 views

Cannot boot 14.04 Ubuntu

I am new with Ubuntu. My new company gave me a Dell Latitude E5440 laptop running Windows 7 64 bit. I am trying to install Ubuntu but neither 12.04 nor 14.04 boot. The common Error that I take on the ...
1
vote
1answer
1k views

Catch lid close and open events

I tried to write a script like this suggestion: How do I configure the screen to lock when I close the lid? I created a directory and a new script file: mkdir /etc/acpi/local gksudo gedit ...
1
vote
1answer
3k views

/etc/acpi/powerbtn.sh for full shutdown menu?

I'm having the same problem as 13.10: Power button shuts down directly and Ubuntu 13.10 with Cinnamon Desktop Environment This answer seems to be the way to go, but I don't know what the command is. ...
1
vote
1answer
2k views

Screen turns black after booting, backlight only works in recovery mode on an Acer Aspire 5736z

the screen turns black after booting. you need to use spotlight to see what is what is displayed on the screen but the backlight works on recovery mode. so my question is how can this problem be ...
1
vote
0answers
991 views

Error message “BUG: unable to handle kernel” [closed]

I extracted the .iso onto a disk, and tried to boot from it. For the longest time, it wouldn't even boot, instead, it would bypass it and boot from the hard drive, until I swapped my newer disk drive ...
6
votes
3answers
8k views

How to shutdown the computer when hitting the Power button?

I have a Xubuntu Lucid 10.04 computer plugged in to my TV. I use the command line to administrate it. Right now when I hit the power button it just opens a Logout screen. How can I set it up so that ...
6
votes
1answer
3k views

What is an ACPI GPE storm?

Just experienced a system freeze (no touchpad, no keyboard, screen looked normal), Alt/SysRq/REISUB didn't work, had to press the start button. In var/log/kern.log I find "ACPI: EC: GPE storm ...
3
votes
3answers
439 views

Remap keyboard Ubuntu 12.04; Asus Q500A

I have an Asus Q500A with win8 and Ubuntu 12.04 64 bit with linux kernel 3.8.0-32-generic. I am using gnome-panel, and xserver-xorg-lts-raring. I have been experiencing problems with the keyboard ...
3
votes
1answer
3k views

Help to fix acpi on my HP Pavilion DV6-6008el

Update: further details related to the issue in this other question. I'm able to boot my laptop only adding acpi=off as kernel parameter in grub configuration file. Without this parameter the system ...
7
votes
3answers
3k views

ACPI issue, help to fix broken DSDT on an HP Pavilion DV6-6008el

I'm having a hard time fixing the ACPI subsystem of an HP laptop (Pavilion DV6-6008el, Ubuntu Natty 64-bit). I can boot only if acpi=off is specified as kernel parameter in grub, otherwise blank ...
5
votes
1answer
5k views

Using quad core, but only 1 CPU entry in `/proc/cpuinfo`? Is SMP running on my computer?

I just upgraded my system and did a clean install of Ubuntu when I did (Installed Oneiric Ocelot from the CD last week but yesterday upgraded to 12.04 LTS). I have an i7 920 (quad core with ...
5
votes
5answers
7k views

Can't adjust brightness on my MSI VR420 laptop

Using every method possible I'm unable to change my laptop brightness.. It's stuck on super max brightness.. Using the slider in the "screens" window int he control panel doesnt do anything, and using ...
4
votes
1answer
468 views

Run a Script when Power Button is Pushed

I'm trying to run a script once I push the power button instead of having my machine turn off. I'm running Ubuntu Server 13.04, but any answers also need to work on Server 14.04. I've looked at ACPI ...
4
votes
1answer
2k views

Is an ACPI GPE storm normal in an Ubuntu session?

In a previous question (What is an ACPI GPE storm?), I asked about ACPI GPE storm. Looking closer to my kern.log file in /var/log/, I notice that in every session at some point (usually withing 20' ...
4
votes
3answers
618 views

ACPI 30k+ interrupts per second

My computer is currently doing something like 30k+ interrupts per second. This causes battery issues as well as the CPU being always stuck at the highest speed, making it very hot (overheating.. 75C ...
3
votes
1answer
1k views

How do you make the keyboard brightness button adjust at smaller intervals? [duplicate]

Possible Duplicate: How to increase brightness in smaller steps? I have a Lenovo Thinkpad T60 running Oneiric. According to the files in /sys/class/backlight, I should be able to adjust the ...
3
votes
1answer
633 views

If I just use a window manager and not a desktop environment, how do I get automatic dock/undock resolution updates?

Gnome and KDE both change resolutions when I dock/undock my laptop. They seem to do it automatically, more or less, based on the state of the computer. I'd like to have that behavior if I just run ...
3
votes
1answer
4k views

Modify manually PWM of my fan (fan speed)

I configured fanspeed but it detects only one "temp" captor... In Gnome Sensors applet, I can see the temperature of three captors... The one of my GPU is 75°, 62° for my hard disk and 32° for my ...
1
vote
0answers
422 views

Won't boot, ACPI PCC probe failed

After updating, my desktop machine will no longer boot. It shows the message ACPI PCC probe failed, starting version 219 and then stops in with a command prompt and some text about it being in ...
1
vote
3answers
1k views

Lenovo X1 Carbon with Ubuntu 14.04 wakes from suspend by itself after 3 hours

My machine seems to wake up from suspend by itself, at irregular intervals. Causing the power to die out, and machine turn off. It is quite the annoyance, when the machine is in my case and it wakes ...
1
vote
1answer
4k views

My power button doesn't work under LXDE. How can I fix this?

Ever since I switched to LXDE my power button won't work anymore. I would love to be able to display a fancy logout menu like the one in Unity and similar DEs. How can I achieve this?
11
votes
2answers
3k views

Does Ubuntu support Core Parking?

Core parking is a new feature that introduced in Windows 7 to get better Battery performance . Depending on the resource use of the operating system it may park one or multiple cores of a multi-core ...
8
votes
3answers
35k views

Booting Ubuntu 12.04 with “acpi=off” grub parameter

In order for me to boot into 12.04, I have to add the parameter acpi=off in grub. Any other options as specified here do not allow me to boot into Ubuntu. My question is simple, what does setting ...
6
votes
1answer
647 views

How do I prevent immediate wake up from suspend (version II)?

This question covers one reason a computer might immediately wake after suspend: How do I prevent immediate wake up from suspend? I seem to have a different one. After a recent security patch update ...
4
votes
1answer
1k views

MSI U130 freezes on shutdown

The computer freezes when i shutdown. I have tried the acpi options acpi=off and acpi=force but they don't work. The computer is a MSI U130. The only way to shutdown is by long pressing the power ...
3
votes
1answer
140 views

Why does Ubuntu think that my iMac is a laptop?

I recently installed Ubuntu 13.04 on my late-2010 iMac. I am dual-booting OS X 10.8.3 and Ubuntu. For some reason, Ubuntu thinks that my system is a laptop. Under the "Displays" settings, it only says ...
3
votes
2answers
5k views

HP ProBook 4720s - Fans running constantly at full

I was given a HP Probook 4720s as a work laptop, over the last 2 years I've predominantly used Ubuntu as my OS for work and home, but recently have needed to use Windows 7 as it controls the fans ...
3
votes
3answers
3k views

Fan making noise while running ubuntu

Hi i have a newly installed version of ubuntu 10.10 on my laptop. When i run windows, the fan is working properly and is not making sound. but when i run ubuntu, its making sound and is runnning more ...
2
votes
1answer
719 views

How to get ACPI health data on a Gigabyte GA-890GPA-UD3H?

I have a Gigabyte GA-890GPA-UD3H motherboard and Phenom II X6 in my desktop computer, and it's all working well, except that Ubuntu 10.10 doesn't seem to detect any ACPI support at all: it can't ...
1
vote
1answer
67 views

Suspend failed once and forever?

I incidentally closed the lid and the system went to suspend (ubuntu 14.04) but seemed lasted forever. So I forced quit the suspend. After I restarted ubuntu and let it suspend, it failed to do so ...
1
vote
0answers
233 views

Has the bootoption “acpi=noirq” any disadvantages in permanent use? Help me with debugging acpi pls

I am using Ubuntu for a while now and I have an average knowledge of it, I thought so ;), but have a problem I cant solve alone. I did a lot of research, but now I cant find an other solution and I ...
1
vote
0answers
182 views

Ubuntu wakes immediately after suspend with Nouveau on GeForce GT 525M [closed]

I've seen a couple similar questions (1, 2, 3, 4, 5), but neither seems to address my case. When I suspend, after a second, I see a terminal with the word "Nouveau" (implying Nvidia problems?), and ...
1
vote
1answer
742 views

Upon installing Ubuntu 13.04, “acpid : exiting”

I tried to install Ubuntu 13.04 from DVD. I choose to install it alongside Window 7. The DVD was it self ejected and i got a black screen and acpid : exiting was written on upper right corner. How ...