Questions related to power management, particularly power saving measures.

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52 views

Problem uninstalling laptop-mode-tools

I am new to Ubuntu and was playing around with some battery saving tools. I first installed tlp, tried it and uninstalled it. Then I got laptop-mode-tools using tar and uninstalled it using ...
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45 views

Ubuntu server on laptop stops responding when I close lid

I have been trying for a couple of hours to get an ubuntu server to not freeze when I close the lid. When I close the laptop the server freezes and I can't restore it, I have to press the power button ...
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101 views

Battery Indicator does not show correct state

My battery indicator does not show the correct state. The battery indicator, and the indicator in power settings, both remain unchanged from the state the machine is switched on. If I switch on ...
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0answers
48 views

PC won't come back when lid is closed and monitor attached

I am using Xubuntu and regulary lock my screen at work. It is attached to a external monitor (primary display) and the lid is closed. After locking it only comes back when I open the lid and press ...
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1answer
99 views

Ubuntu 15.10, if I suspend from toolbar it's ok, if I close laptop lid when I resume it keeps logging me out

So as the title states: Ubuntu 15.10, if I suspend from toolbar it's ok, if I close laptop lid when I resume it keeps logging me out / going to lock screen after 10-20 seconds. I have a razer laptop,...
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1answer
95 views

Dell Inspiron 5423 CPU low-power state Non-Dell Power Adapter

So I've been trying for hours now to get the CPU out of the low power state. The Processor is a Dual-Core with HT @1.8ghz however because im not using a Dell Adapter its missing the protocol chip that ...
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125 views

Strange fan behavior on 15.10 in HP Pavilion laptop

I recently installed Ubuntu 15.10 on a new HP Pavilion laptop. All the time, even when the temperature given by sensors is low (< 30C), I hear a fan. The sensors command does not give any data on ...
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105 views

Lid Closed Suspend Ignore issue - 14.04.3

I have tried many various methods to get it where the computer ignores the lid closing. Essentially, I don't want it to sleep. At all. Here's what I've tried: Changing the power settings. Power ...
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61 views

Automatic Wifi switching

On my laptop, I often need Wifi connection for several seconds (to load a page) only to switch it off immediately afterwards to save power, since I'm reading and I won't need any connection during a ...
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1answer
196 views

sedutil suspend

I'm using sedutil and LinuxPBA for full disk encryption on my Samsung Evo 850 SSD. Everything works fine, except that I am unable to suspend while encryption is "enabled" since the disk loses power ...
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1answer
120 views

Dell Inpsiron 15 running Ubuntu 15 runs hot and battery drains fast

My laptop runs at around 55 degrees (Fahrenheit) after its been left idle, upon startup its only about 38. On Windows 10, it's only up to about 45 degrees at max. My battery life used to be about 3-5 ...
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17 views

Why does urfkill does consume so much CPU occasionally?

I have noticed that some times urfkill consumes suspiciously much (100% or near) CPU resources during rather long periods of time on my Ubuntu 15.10 laptop. I am curious of what can be the cause of ...
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40 views

installed 14.04 LTS ubuntu and now computer can not go into suspend.

installed 14.04 LTS ubuntu and now computer can not go into suspend. closing the lid also does not suspend. my computr has no disk drive, fyi. not skilled in linux but can enter terminal scripts if ...
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1answer
32 views

Double suspension on wake up

Good morning, I have an ASUS laptop (550 serie) with an odd behavior: when I wake it up (lid closed) I get the screen, I manage to input my password but after a few seconds it goes in suspension ...
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38 views

upgraded to Ubuntu 14.04 LTS and computer no longer Suspends

I am a lay user of ubuntu. I just upgraded to 14.04 LTS and now my computer will not suspend. When I click 'Suspend' on my menu, the screen blacks out as if it is going to suspend, then boots right ...
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0answers
38 views

Command to find out which program is keeping ubuntu awake or waking it up

Windows has powercfg -lastwake and powercfg -requests to find out what last woke up windows or which program last requested keep awake. Is there Ubuntu equivalent?
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14 views

Kubuntu power options causing odd shutdown glitches

I've set my old laptop running Kubuntu 15.10 to sleep when I press the power button. If, however, I let it sleep for more than about 10 minutes, it logs out instead. How can I fix this??
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46 views

upower -d command not working on my Ubuntu 14.04

It is showing following warning: (upower:8781): libupower-glib-WARNING **: Couldn't enumerate devices: Message did not receive a reply (timeout by message bus) (upower:8781): UPower-WARNING **: ...
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1answer
92 views

Computer does not suspend until network cable is disconnected

After pressing "suspend" in unity menu computer (desktop) suspends, power LED turns off, disks are stopping. Then in less than second it resumes. Searching gives solutions like this laptop fails to ...
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63 views

Original MacBook Air Running 14.04 Won't Turn on Backlight after waking

I have the original MacBook Air running Ubuntu 14.04 (Which is running really well, except for one thing.) I seem to have everything working, except waking the computer from a lid close. After I ...
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101 views

pm-utils hooks not working to un/load modules on suspend on Ubuntu GNOME 15.10, alternatives?

Suspend & hibernate are not working properly as long as I have an SD card inserted into my machine. Removing it is not a sustainable option for my set-up. The internal SD Card reader of my ...
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55 views

Is there any GUI for Intel P-state fine-tuning?

I like using indicator-cpufreq, but I'd also like to use Intel P-state, as it sound like promising. The problem is, you can't really control it's behavior. I've tested it a lot and came to conclusion ...
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1answer
148 views

Macbook Air overheating on firefox

Just installed Ubuntu 14.04 on my 2014 Macbook air .. when opening up firefox it starts to heat up a little like from 49°c to 55-56°c .. and then when streaming video on youtube it just goes up to 78°...
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1answer
144 views

how to disable low battery alarm?

i have the low battery alarm disabled in the BIOS settings on my lemur laptop, but the alarm still sounds when the battery is low. The sound is a very loud and annoying beep that repeats every couple ...
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1answer
44 views

Power Outtage - Kubuntu 15.10 [closed]

Can Kubuntu 15.10 normally recover from a mains power failure? Computer will not boot normally - always goes to Emergency Mode. In the emergency mode i tried the options there - no result. Solved. ...
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2answers
481 views

Does TLP really help increase battery life?

I am using TLP for power management. But I suspect it doesn't really help extend the battery life on my Dell Inspiron 5346 with Ubuntu 14.04, so I ran sudo tlp-stat once with display brightness ...
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88 views

Ubuntu 14.04 sometimes does not suspend when laptop lid closed

Ubuntu 14.04LTS. Set to suspend when lid closed. Mostly it works - often I can use it for a week, suspending and resuming with no problems. But sometimes something changes and it stops working: ...
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78 views

Intel HD 4000 stuck at 1050-1100Mhz 14.04.3

Samsung NP550P5C-S02 14.04.3 kernel 3.19 xorg 1.17 nvidia-352 mesa 10.5.9 So intel HD 4000 is stuck at 1100Mhz and CPU idle temperature is about 55-60C. When gaming on my nvidia card(bumblebee-...
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2answers
226 views

Intel Power Management not working on ubuntu 14.04

I am new to Ubuntu. My laptop is Lenovo Z570 Intel® Core™ i3-2348M which i bought 4 year before. Still working as a hero :P Recently i switched to Ubuntu 14.04 64 bit. But it ended up in burning my ...
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1answer
52 views

Why is my laptop losing so much power while in suspend mode?

Last time I used my laptop, I had it plugged in, and so at the time I closed the lid and put it into suspend mode, it had 100% power. However, when I opened the lid now, the a day later, and resumed ...
3
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0answers
18 views

How to play sound before suspending laptop?

How do you configure Ubuntu 14.04 to play a short sound just before it suspends? I bought a laptop which I later found had no visible status LEDs when the lid was closed. On past laptops, I've had ...
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47 views

cannot disable suspend after inactivity on Ubuntu 14.04

I just recently switched back to using Ubuntu, and there is something I can not seem to fix. I do not want my pc to suspend after inactivity, and so I set this in the power settings menu. However, ...
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0answers
288 views

15.10 - Ubuntu does not power off on shutdown

I have been around the internet trying to find the answer and no solution given has worked. I have disabled quiet and splash from /etc/default/grub so I can see the output. When shutting down, there ...
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0answers
125 views

Ubuntu won't start after closing laptop lid

I am running Ubuntu 14.04 LTS on a Dell latitude e6430 laptop. Whenever I close my laptop lid or sometimes when I lock the screen before shutting the lid, when I open the lid again Ubuntu won't pull ...
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1answer
234 views

Critical battery action gracefully shutdowns instead of hibernating

Running Ubuntu 14.04LTS. Enabled hibernation and manually tested pm-hibernate successfully. I updated the values in the gnome power manager i.e. org.gnome.settings-daemon.plugins.power use-time-for-...
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0answers
18 views

Cycle monitor power on Suspend/Resume

I'm trying to find a way to get my Ubuntu desktop to automatically turn off my monitor (actually a Sceptre TV) when it suspends, and automatically turn back on when it wakes. They are hooked up via ...
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0answers
52 views

Acquiring a wake lock

How do i aquire a wakelock on ubuntu phone? i tried with the usual android method: echo something > /sys/power/wake_lock but i get: -bash: /sys/power/wake_lock: Permission denied any help?
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125 views

USB wakeup does not work when lid is closed

I have a dell xps 13 9333 with ubuntu 14.04.3 LTS. I'm using this as a desktop computer, with an external monitor and USB keyboard. The system is configured to 'Do Nothing' when lid is closed (see ...
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0answers
238 views

Disable wifi power management

Problems: 1) Power management makes Wifi connection unstable. I need to disable it completely 2) My wifi doesn't automatically turns on after sleep. I should do it myself Info Laptop: Dell ...
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1answer
511 views

How do I set battery charging thresholds

I am new to Ubuntu and I don't speak computerese. I really don't! I have read the various threads on the topic and still can't work it out. I have recently purchased a Lenovo Thinkpad x250 and I ...
0
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1answer
148 views

Battery drains out in 24 mins (Ubuntu 14.04 on Lenovo Thinkpad x201i)

Hardinfo Extract | Battery -Battery: BAT0- State : charging (load: 186 mA) Capacity : 610 mAh / 5600 mAh (10.89%) Battery Technology : rechargeable (LION) Model Number : ...
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1answer
55 views

Poor Battery due to WiFI Intel 7260 Ubuntu 14.04

I am using a Lenovo T440 laptop, which has an Intel Dual Band Wireless-AC 7260 WiFi card. According to PowerTOP, the card is using about 9.5W power while the rest of the system uses less than a fifth ...
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0answers
128 views

Run *ONLY* `/etc/acpi/powerbtn.sh` when power-button pressed, and not *ANYTHING* additional

I want to run a custom script when the power-button is pressed. For a simple test, I put only a single line in /etc/acpi/powerbtn.sh. That line creates a file it_ran.txt in my home folder. There is ...
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0answers
17 views

Screen blank as soon as I stop moving mouse/keyboard

I just upgraded to Wily, and I'm having a strange issue. My screen is blanking (entering power savings mode), literally, within seconds after I stop moving the mouse or touching keys on the keyboard. ...
0
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1answer
91 views

Resume from Suspend closes applications

Just loaded Ubuntu 15.10 on my old HP E1 Vision and am very pleased with it. I have a minor issue in that if I Suspend using the power icon in the upper right corner of the screen, close the lid and ...
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0answers
26 views

how to enable(swith-on) usb-power in ununtu?

I am using sony vaio laptop , intel i5 processor which give me facility to charge my phone through one usb 3.0 port of my laptop even while my laptop is powered off. In windows sony vaio manager give ...
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1answer
159 views

Inspiron not waking up after lid open (Trusty)

I've installed Trusty (14.04.3 LTS) on a brand-new Dell Inspiron 13 (7000 series). Everything else seems to be working well, except that the laptop does not wake up after Suspend on opening the lid (...
0
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1answer
125 views

Keyboard of Acer Aspire A5943G not working properly

I have an Acer Aspire A5943G laptop, and its keyboard is not working properly. The keys SDGHM and some shift combinations produce either no characters at all, or just sometimes with wrong delay and ...
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0answers
117 views

Occasional Macbook pro suspend failure when closing the lid

I'm running Ubuntu 14.04 on a 2012 Macbook Pro, and every now and then when I close the lid, instead of suspending like it usually does (and corresponding to what I have set in settings), the screen ...
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0answers
53 views

/etc/pm/power.d settings ignored in kubuntu 15.10

I'm trying to improve power consumption in my laptop. I've took the suggestions from the awesome powertop utility, and put them in a script called: /etc/pm/power.d/10evert When I manually run the ...