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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0
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1answer
137 views

Error: Cannot find backlight controller for radeon acpi graphics card

I get the following message every time I reboot Ubuntu 14.04 LTS: drm: radeon_acpi_init Error: Cannot find a backlight controller What does this mean, and how can I fix it? Many thanks for your ...
0
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0answers
34 views

peripherals switch off, caused by overheating: ACPI problem

I have an HP Pavilion dm1-4125sa Laptop, 64 Bit with 1.7 GHz AMD Dual-Core E-450 CPU, dual-booted with Windows 7 and Ubuntu 14.04. Often when I am in Ubuntu (only Ubuntu, Windows is fine), when it ...
26
votes
3answers
42k 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 ...
1
vote
1answer
27 views

Trying to run Ubuntu 12.04 or 14.04 with old ATI cards

First, I've tried Ubuntu 12.04, Ubuntu 11.04, Ubuntu 10.04, Xubuntu 11.04, Xubuntu 12.04. Video card is ATI Radeon 9600/9550/X1050 Series. I've done some digging before I decided to ask question ...
0
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0answers
38 views

14.04 BIOS, ACPI Errors in dmesg

I recently upgrade from 12.04 x64 to 14.04.1 x64 Dell Latitude Laptop I am seeing messages in dmesg that are causing me concern. The 2 excerpts below are the ones I am most concerned with: [ ...
4
votes
3answers
3k 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: ...
1
vote
0answers
35 views

Gateway ML3109 only boots with “acpi=off”

I have a Gateway ML3109 that I have installed Lubuntu 14.04.1 LTS 64 bit on. I used the alternate installer, and the acpi=off option during the install. My system will only boot with the parameter ...
0
votes
0answers
90 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. However, the battery indicator in the system tray is not updating at all. If I start the ...
1
vote
1answer
104 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
votes
1answer
301 views

Thinkpad W520 brightness modification requires suspend

I have a Lenovo Thinkpad W520 with 12.10 installed on it. The specifics are: Linux corellia 3.5.0-19-generic #30-Ubuntu SMP Tue Nov 13 17:48:01 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux It works ...
1
vote
0answers
69 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 ...
0
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0answers
11 views

How does Ubuntu process the press of the power button and other keys presented on the keyboard?

How does Ubuntu process the press of the power button and other keys presented on the keyboard? There are many hot keys on my keyboard: Power Button, Volumn Up, Volumn Down, Mute and so on. How does ...
0
votes
1answer
65 views

rtcwake cron does not work

I intend to put my computer to sleep every night and make it wake up again next morning. I found that rtcwake would serve my purpose. However putting it in the crontab does nothing. Following is my ...
1
vote
0answers
102 views

Extremely slow ACPI Event Propagation

A follow up to my previous question here: Run a Script when Power Button is Pushed So I am able to detect ACPI events and I intercept the power button press appropriately, however there is an ...
3
votes
1answer
150 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 ...
0
votes
1answer
61 views

ACPI not running custom script on power button press

Any idea how I can debug acpid not starting my custom script on modified xfce4 environment. I've modified "/etc/acpi/events/powerbtn" to point to the correct script: event=button[ /]power ...
12
votes
1answer
21k 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 ...
0
votes
1answer
12 views

What does acpi -t measure?

Whenever I use acpi -t, no matter what I'm doing, the temperature it displays is the same: Thermal 0: ok, 14.0 degrees C So to try and figure out why that is, I go to the man page: acpi Shows ...
0
votes
1answer
16 views

How can I log acpi temperatures?

I'm trying to debug why my computer randomly shuts down sometimes, and to rule out temperature issues (since I don't think that's the case) I would like to log the output of acpi -t somewhere so when ...
0
votes
1answer
942 views

How to stop acpid restarting /etc/acpi/lid.sh restart unnecessarily? [closed]

On my Acer Aspire One netbook, I have noticed that acpid starts /etc/acpi/lid.sh multiple times a minute. This script should only be started when the lid is closed or opened. How can I stop theses ...
2
votes
1answer
141 views

Why can't I poweroff my computer if it isn't connected to a power supply?

When my computer is not plugged in the poweroff function doesn't work. It just boots up after poweroff. Whenever I poweroff by the way of GUI clicking or typing command poweroff or halt, my computer ...
0
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0answers
28 views

How to reverse the color of [HP] touchpad button/indicator LED

I have Ubuntu 14.04 running on a Compaq CQ60 laptop. The laptop has a button just above the touchpad which allows the touchpad to be enabled and disabled. There is a LED under this button, which (when ...
0
votes
1answer
85 views

How to disable the [HP] ACPI button for the wireless card?

I have Ubuntu 14.04 running on a Compaq CQ60 laptop. Ever since I installed Ubuntu (back on 12.04), the "toggle wireless" button next to the power button hard locks the WiFi adapter, causing me to ...
3
votes
3answers
299 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 ...
0
votes
1answer
197 views

Overheating in an dual-boot system (windows 8+Ubuntu 14.04)

Precisely, I would like to know if booting windows 8 through GRUB can affect in any way the global performance (CPU/GPU benchmarks, cooling efficiency etc...) in both Windows and Ubuntu 14.04 ... I ...
0
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0answers
43 views

ACPI Events not triggered after booting

I purchased a Convertible (Laptop and Tablet, Ubuntu 14.04 installed) and would like to execute a script when changing from laptop to tablet mode and the other way around. So I created two new files ...
8
votes
2answers
2k 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 ...
0
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0answers
262 views

how to improve boot time and solve overheating issues?

Okay guys, I am new to Ubuntu and Linux. Truth be told, my first time feels like hell. I have been having problems booting up (takes a lot of time). My laptop is overheating and I can smell things. ...
0
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0answers
105 views

Weird possibly ACPI related behavior on 14.04

Since upgrading my notebook to 14.04 I've observed a weird behavior, possibly tied to ACPI; sometimes on boot, hotkeys like ctrl + alt + T and function-keys like fn + ⌨ (for keyboard-backlight ...
0
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0answers
79 views

Ubuntu shows only one core with nolapic booting option

The only way I can boot my Ubuntu (13.10) on my iMac properly is with 'nolapic' option. However, as far as I know, this option disables all the cores but one. I wonder, is there any way for me to boot ...
0
votes
1answer
384 views

Ubuntu 14.04 live disk only starts up with acpi=off

I recently tried to run ubuntu 14.04 on a USB drive as I wanted to decide whether it is worth upgrading to(my netbook now has 12.04 on it). However, when I tried to start ubuntu up from the USB ...
4
votes
1answer
72 views

Does Ubuntu Phone support RTC Alarm?

Is /sys/class/rtc/rtc0/wakealarm present? Does phone wake up after setting it when it's completely switched off? What does it do when the phone is locked? Will it be supported in hardware by all ...
0
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0answers
27 views

How do I enable S3 acpi support?

My PC Bios has support for S1 and S3 acpi. I would like to enable the S3 suspension, however when I do try to suspend, the Bios boots the computer but the kernel doesn't come up and take over. All I ...
0
votes
1answer
74 views

UPower reports Incorrect Capacity

I've just replaced my old Netbook battery with a new one of higher capacity. It was a cheap battery off of Amazon which clearly reads as a 5200mAh battery but Ubuntu reports the battery as being the ...
0
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0answers
116 views

System crash: empty /sys/class/backlight (deleted acpi_video0) & now the error “disk drive is not ready yet or present”

I "tried" to set the default brightness for Ubuntu 14.04. Following here, At first I did: echo 5 > /sys/class/backlight/acpi_video0/brightness then: sudo apt-get install xbacklight then ...
1
vote
1answer
99 views

Computer reboots instead of shutdown, only after suspend

I have posted seen this on the Ubuntu forums (http://ubuntuforums.org/showthread.php?t=2175057), but its not drawing a solution there so I am posting here. Problem is when I shutdown my computer it ...
1
vote
1answer
2k views

Ubuntu 13.10 won't suspend

Have been thru several threads with similar issues, but no resolution. ASUS X201E, freshly upgraded to Ubuntu 13.10. Suspend from any menu does not work since upgrade. When I select "Suspend" from the ...
0
votes
0answers
40 views

Suspend to RAM not working

It used to be working in Xubuntu 13.04, now I'm using Ubuntu studio 13.10 and it doesn't switch off the fans. If I resume (press any keys, also Wake up Key) it goes back normally, but If I manually ...
1
vote
1answer
2k views

Xubuntu 12.10 doesn't save screen brightness on reboot

I have a laptop running Xubuntu 12.10 that doesn't save the brightness setting on reboot. There are some explanations on Ask Ubuntu about how to have a specific brightness be set on reboot, but not ...
1
vote
1answer
113 views

VirtualBox Ubuntu 12.04 LTS guest cannot shutdown

I have a virtualbox guest running Ubuntu 12.04 LTS. The host is also an Ubuntu 12.04 LTS. Virtualbox running is version 4.3.10 When I'm running in the guest and click on the shutdown button, nothing ...
1
vote
0answers
103 views

How can I extract the DSDT (Differentiated System Description Table) of my notebook? [closed]

I am planning to convert my T420s notebook to a hackintosh notebook. But I currently can't boot the hackintosh installer. Someone said I could save and extract the DSDT in Linux, which would help me ...
3
votes
2answers
8k 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, ...
0
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0answers
89 views

AC power plug/unplug events

Running Ubuntu Server 13.04 (kernel 3.8.0-19-generic)* . I want to react when AC power is applied or removed. I can query the state correctly either through acpi -b or cat ...
3
votes
1answer
334 views

How can I prevent anything from happening when I shut the lid of my laptop?

I have a laptop running 12.04 Server Edition, and I'd like to be able to shut the lid without anything happening. I need it to remain pingable and sshable and continue to run all of its daemons and ...
0
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0answers
78 views

Unable to disable all acpi events relating to lid

I want to disable all lid processes because sometimes my ThinkPads cannot wake from a blank screen after having lid closed. I have commented out everything in /etc/acpi/events/lidbtn but still the ...
0
votes
0answers
82 views

acpi_listen doesn't detect events

I can run acpi_listen, then press all of the function keys (eg Fn+F5 to dim the screen backlight), but no events are reported in acpi_listen. How can I get acpi_listen to report the acpi events that ...
0
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0answers
254 views

Ubuntu 13.10 on Asus N550J : battery detected and charged, but laptop won't work without charger plugged

I recently installed Lubuntu (1st time user) on my Asus N550J laptop. I'm having a problem with the battery or the charger, I don't know for now; the battery is there and I presume it is detected : ...
0
votes
2answers
2k views

Ubuntu 12.04 halt/poweroff trouble

I successfully installed Ubuntu Server 12.04 32-bit on a HP Proliant Microserver, everything works perfectly but when I try to turn off the machine with the command halt or poweroff hangs after ...
0
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0answers
20 views

Problem using acpi_call_GUI on dell inspiron N5110

I just installed acpi_call_GUI on my laptop using this guide. (In order to switch off discrete graphics at every boot) Now when i run the software , i click to install acpi_call. After that it asks me ...
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0answers
60 views

Network speed drop when not charging

I can surf the web when I am charging my laptop ,but when i pull my charger out to run on battery power, it looks like the internet speed drop to 0kb/s. I tried to turn acpi=off in grub.cfg this ...