Questions related to power management, particularly power saving measures.

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39 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 **: ...
3
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1answer
88 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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0answers
55 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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0answers
86 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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0answers
39 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
111 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 ...
2
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1answer
97 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
43 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
364 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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0answers
79 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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0answers
75 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 ...
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2answers
179 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
49 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
17 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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0answers
36 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
263 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
101 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
176 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 ...
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0answers
16 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
50 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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0answers
105 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
189 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
313 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
136 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
52 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
100 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
14 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
votes
1answer
65 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
25 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 ...
0
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1answer
134 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
90 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
90 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
52 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 ...
0
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1answer
126 views

Wierd Lid close/open and suspend problem

I have an old Thinkpad W510. The pm-suspend works, the lid close then suspend does not. After some searching, I found the following solution. create /etc/acpi/events/lid (there's no lid related ...
0
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1answer
191 views

Set i915 to low-power /Reduce thermal throttling

Samsung NP550P5C S02 i5-3210M GT 650M Ubuntu 14.04 Gaming (especially in wine) and bumblebee/primusrun severly degrade performance after a few minutes due to powerclamp throttling! This is extremely ...
2
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2answers
1k views

Fan is constantly running after 15.10 update

Updated to Kubuntu 15.10, after that the fan is running constantly. I've installed tlp, fancontrol, etc. Sensors show a CPU temperature of only 50°C. I've got a GT620M but run the offical nvidia ...
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0answers
154 views

New battery is stuck at 72%, says it is charging, but unplugging the charger will shutdown the computer

I just bought a battery for my Alienware M14x r2 laptop. It is a 1 x 8 Cell. I plugged it into my laptop, and the percentage automatically showed 72%, and charging. The charging percentage has not ...
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0answers
80 views

How do i unrestrict battery charge percent on a lenovo running ubuntu?

I recently bought a Lenovo z51, and later used the battery management program that came with it to reduce the max charge to 60%. I have since than installed Ubuntu 14.04 and uninstalled windows. I now ...
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0answers
40 views

After installation of TLP I have notice a increase of 5 up to 7 seconds on boot in xubuntu

I have intalled TLP on xubuntu and I notice a increase of time btw 5 up to 7 seconds on boot time according dmesg output and I have now some ACPI Warnings on boot, I'm attaching my dmesg output and my ...
1
vote
1answer
135 views

Locate power-hungry USB device seen in powertop

The battery life on my Dell XPS 13, while never great, has gotten seriously bad lately. Using powertop, I've noticed that there seems to be some sort of USB device drawing quite a bit of power. ...
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0answers
28 views

Notebook starts when plugged in, no power button needed

One week ago my notebook (Dell inspiron 640m) starts as soon as I plugged in to electricity or I insert the battery. I do not need to push the power button. This is not a normal turn on, in fact it ...
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0answers
34 views

Screen isn't locked when going to hibernate in Lubuntu 14.04

My '''Lubuntu 14.04.3 LTS''' offers me a ''Power Management'' dialog in the settings. The title of that window is "PowerManagment for XFCE" (not lxde!). In there I enabled "Lock screen when ...
0
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2answers
115 views

How can one force the laptop batteries to charge beyond their recognized limits?

My thinkpad has two batteries delivering approximately 200Wh. However the main battery is aging a little, losing its capacity, or so the battery is telling me. What I wish to accomplish is to ...
2
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0answers
119 views

Laptop instantly wakes from sleep/suspend when battery is low

I have an EliteBook 2570p with Ubuntu GNOME 15.04 installed. When the battery is low I can suspend the computer or put it to sleep, but it wakes up right away. For example, sometimes I am working on ...
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0answers
37 views

Possibility to Limit Processor Utilization by %?

This question refers to the feature in Windows Power Settings that has 2 options: Minimum processor utilization: 0% Maximum processor utilization: 100% Since the default Power Options in Ubuntu ...
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0answers
15 views

Sleep buton no longer works on U12.04

I had and still have setting to show pop-up window when sleep button on my keyboard is pressed: gsettings get org.gnome.settings-daemon.plugins.power button-suspend = 'interactive' gsettings get ...
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0answers
74 views

Nothing happens when I close the lid or press power button

I just installed on Ubuntu 14.04.3 on my laptop (Lenovo Thinkpad X230). Everything works fine except: closing the lid pressing power button while the computer is on does nothing, even though I ...
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0answers
93 views

How to disable EEE in TG3 Driver (disable energy efficiency ethernet)?

I can easily set the eee to off (0) by using ethtools, but it doesn't stay disabled after a reboot - how do I make it permanent? Do I have to rebuild the driver with the EEE flag?
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0answers
38 views

My ubuntu not powering off version 14.04 hp laptop

I am having hp laptop. i installed Ubuntu 14.04. The problem is it is not shutting down. i need to press power button to shut down. i tried almost all steps like changing /etc/default/grub, installing ...
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0answers
74 views

Laptop will not hibernate when battery is critical

My laptop does not hibernate when the battery is critical. I tried the suggestions in several posts with related or similar titles. These included ensuring that pm-hibernate works modifying the ...