Questions related to power management, particularly power saving measures.

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8 views

What are the devices listed in gnome shell's power managemnet settings

What are the devices listed here? k520 and M310... what are these and why is one at 55%?
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8 views

Command to sleep (put into low power state) and scheduled task to wake back up [duplicate]

I can use sudo pm-hibernate to put my laptop into a low power state, but I have to press the power button to turn it back on. Is there a way I can put it into a low power state that can then be turned ...
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22 views

USB external HDD spins down, but just from command line. I must be missing something

I have two different external USB 3.0 hard drives connected to my Ubuntu computer and none of them auto spin down after 10 mins. Funny thing, if I run a Windows 8.1 virtual machine and attach the ...
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1answer
24 views

How to temporarily disable sleep and hibernate from the command line

It seems like there are many ways in which a Ubuntu's settings can be permanently manipulated to sleep when desired as long as predetermined conditions are met. However, these are more permanent ...
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0answers
12 views

Openbox and xfce4-power-manager

I am using Ubuntu and openbox. When I start up, I see the normal login screen like when using unity and it connects to Wifi. I have selected openbox from the dropdown list and it remembers this ...
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0answers
29 views

Is there any way to make the system not to suspend while a download in progress?

Is there any way to set the system not to suspend while a download in progress but only turn screen off?
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1answer
36 views

SED (self encrpyting disk) is crashing on system resume

I have asked this question before (here and here ) My problem is that my Self Encrypted Disk (SED) have to NOT spin down even on suspend! I have tried this, but it did not work and the disk spin ...
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1answer
15 views

How do I get my power indicator to reliably warn me before shutting off my laptop?

A while back I was having trouble because my power indicator for my laptop running Ubuntu never warned me when the power was about to go off. That was when using Ubuntu 14.04, and to be honest, I ...
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1answer
23 views

Found low power CPU looking for Asus MB [on hold]

For my home I'm looking to build low powered Ubuntu Desktop machine and I found this article for low power CPU ...
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1answer
50 views

Screen dim while brightness set to max on Xubuntu 14.04 everytime display turns off

I used to have an issue where every time my laptop would return from suspend, the screen was fully dim (as if brightness was at a minimum) even though the brightness setting was set to maximum - so I ...
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1answer
25 views

USB Power Saving Settings

I have a USB weather station. If the screensaver kicks on (blank screen and lock), data from the weather station stalls out. I can lock the screen manually and I have no issues at all with the ...
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0answers
72 views

Wake on LAN cause computer wake up immediately after shutting down

I've installed Ubuntu on my Dell PC, and i want to use Wake on LAN. But here i encounter a weird problem. The computer will wake up immediately after shutting down. Here is what i've done: The ...
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0answers
37 views

Battery efficiency issue in Ubuntu 14.04

I have an HP Probook 440 G2, with an intel core i5-4210U processor. I have dual boot windows 8.1 installation. I get approx 5+ hours of battery backup in Windows 8.1 and approx 2+ hours in Ubuntu. My ...
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1answer
52 views

how to disable charging in ubuntu when battery level is above 80 percent?

I tried various tutorials to stop charging laptop battery but it is not working on my Lenovo laptop. I tried following commands: sudo apt-get install tp-smapi-dkms sudo modprobe tp_smapi ...
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1answer
81 views

How to set hibernate/shutdown timers? XFCE power manager not having an effect in Lubuntu

I like to fall asleep listening to internet radio or a streaming video. I would prefer to have my computer go into hibernate mode an hour after I've become inactive, not 15 minutes after. I would ...
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1answer
53 views

Charging only ever reaches 95%

I am using Ubuntu 14.10. And my computer is always attached to an AC power source thus it is always charging. But I have noticed that my battery says it is charged when I click on the battery icon in ...
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0answers
50 views

Confused about Light Locker/Power Manager settings in Xubuntu 14.04

In Xubuntu 14.04, Light Locker and Power Manager settings are different control panel views, however, there are screensaver settings inside Light Locker's one. Anyway, there's no screensaver options ...
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1answer
41 views

Energy Saving on Ubuntu PC's (not Laptops!) [duplicate]

Can I use software designed for power saving on laptops on Home PC. (not a laptop) Or maybe someone could suggest alternative tools designed for saving power on PC desktop? What are the other steps ...
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0answers
66 views

Power Management

I'm running Ubuntu on an Acer Aspire V Nitro - VN7-571G laptop. The battery should last for 8.5 hours with Windows 8.1, but with Ubunt the battery drains in about 3 hours. Acer has no drivers for ...
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0answers
31 views

Laptop Brightness not remembered on Power Plugged in

On Ubuntu 14.10 Utopic, using a Samsung Notebook laptop, I can change the brightness correctly and it is remembered upon wake from sleep. However my problem is that when my laptop is on battery and I ...
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0answers
29 views

How to dump selected iwconfig outputs to text files? (to analyse Tx-power, bit rate, link quality, etc. for EMF reduction)

BACKGROUND I've read about Electromagnetic Field (EMF) pollution and I want to protect myself. I have a not bad solution for my smartphone, now decided to tackle WiFi. It appears that power of the ...
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0answers
15 views

Problem with pm-suspend and mSata

I noticed a strange thing when i put my computer in pm-suspend mode my hard disk (mSata crucial m550) continue to be a litlle hot ... It seem to be power up ... I think it isn't normal But i ...
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0answers
21 views

Macbook 9,1 Ubuntu 14.04 keyboard issues on resume

I have read many similar post and tried nearly all post to no avail. Screen and keyboard illuminates; but no keys actually work. (I tried the F6 trick too) Trackpad does allow me to move the ...
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2answers
153 views

Laptop freezes whenever I unplug/plug in AC adapter

I have a Samsung Series 9 laptop, model NP900X4C. For a long time now this laptop has had issues with the battery and AC adapter, like this, which got fixed about six months ago: ...
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3answers
104 views

How to shut down Lubuntu immediately with the power button instead of a logout method dialog prompt

I would like the computer to shut down directly after I press the power button. At the moment, Lubuntu opens a shutdown method dialog box when I press the shutdown button. I suspect I can simply ...
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0answers
87 views

How to disable automatic brightness adjustment in Ubuntu 14.04?

I am running Ubuntu 14.04 LTS on a Dell 3542 laptop. My problem is that screen brightness changes depending on content. I think this is called automatic (or dynamic) brightness adjustment, as I stated ...
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0answers
49 views

Laptop hangs instead of suspends when closing lid

I have a HP Pavilion DV6 laptop with Ubuntu 14.04 LTS dual boot with Windows 8. Not every time but occasionally if I close the laptop lid it does not suspend as it should, but hangs with the power ...
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1answer
54 views

Laptop lid power options

How do I configure my laptop to perform in the following manner in Ubuntu 14.04.1 Server? Current State When the laptop is powered on and the lid is closed: External screen loses signal Laptop enters ...
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0answers
47 views

GRUB boot options in Refind

I'm trying to lower the power consumption on my Macbook Air with the steps at https://help.ubuntu.com/community/MacBookAir6-2/Trusty#Finetuning_Powersave_functions but I can't seem to get tlp stat to ...
2
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0answers
102 views

Battery not working/charging but detected

i have a thinkpad t 410 and ubuntu 14.04 LTS installed. everything worked fine for a long time, but since a week or so my battery is not working properly any more (orange battery light flashing) it ...
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1answer
180 views

Ubuntu 14.04 EliteBook 8460p constant fan, hot, short battery

Finally took the plunge from Ubuntu in VM to wiping Windows and installing Ubuntu 14.04. I'm liking it so far although I've noticed the laptop gets hot very quickly, the fan is constantly on, and the ...
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0answers
57 views

Ubuntu (14.04) freezes on laptop when disconnected from power

I have Ubuntu 14.04.1 installed along windows 7 (dual boot). My laptop is a HP Compaq 6710b which has an Intel CPU and an Intel graphics card. When I boot my laptop on the power adapter, no problems ...
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0answers
15 views

Power management policy for all users

I have a machine with one administrator user and one standard user. Is it possible for the admin to set a power management policy (suspend after 30 minutes of inactivity, for example) that the ...
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0answers
45 views

Ubuntu (14.04) freezes on laptop when power not inserted

I use Linux Mint 17 Qiana (on Ubuntu 14.04.1). My laptop is a Dell Inspiron M5110 which has an AMD CPU and an AMD graphics card. When I boot my laptop on battery, no problems occur. When I boot my ...
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1answer
100 views

How to repair powerstate (intel_pstate) on Intel Haswell chips?

I recently installed tlp on my Lenovo U430p laptop. After I runned it I noticed significant drop in my laptop's on bettery time. Now my laptop lasts on battery for 2 hours less than before. After ...
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1answer
88 views

Turn power OFF of USB Ports - Ubuntu 10.04 machine

I have Ubuntu 10.04 based portable touchscreen computers at workplace and sometimes people would use USB data cable to charge their phones from the USB port. Now I have usb storage access disabled ...
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1answer
49 views

Controlling Fans on an HP Probook 4525s

I would like to simply set my fan to run at 100% speed all the time. Is there any way to do this without fancontrol? Is there a way to physically make the fan run at all times (external power?) or ...
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0answers
53 views

TLP + PHC seem not to work after resume from suspend

I installed TLP 0.6. I also have kernel 3.14.2 with the PHC module for Ubuntu 14.04 (which is what I use). It seems to work when I reboot. The temperature is low. But after I resume from suspend the ...
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0answers
44 views

Lenovo Yoga 2 Pro and Ubuntu 14.04: Power display not updating

The percentage and remaining battery time display on the top right do not update on my Yoga 2 Pro that is running Ubuntu 14.04. However, if I click on the battery and Power Statistics program starts, ...
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2answers
41 views

Cannot Keep Ubuntu Server running on a laptop despite workarounds

I have ubuntu 14.04.01 server. I have edited /etc/systemd/logind.conf and changed to HandleLidSwitch=ignore saved file then executed sudo restart systemd-logind I even rebooted the computer I ...
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0answers
92 views

Settings of Power type MAAS node for manage VMware esxi images

i create a maas-controller with 5 nodes and i manage these whit Vmware Vsphere . I am setting power type for virtual machine "virsh" but i don't use kvm and the qemu+ssh string does not work ...
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0answers
26 views

Which part of the kernel powers on/off USB ports? How - the internals?

Please refer to this post: Power on/off USB ports . It is one thing to blindly replicate the codes in a terminal and get the desired results. I wish to know which part of the kernel does this work, ...
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0answers
47 views

Just installed Ubuntu 14.04 Battery no longer charging past 70%

thanks for the help. I just installed Ubuntu, and it was working fine yesterday. I just fixed my internet connection speed, but now my battery is stuck at 70% charged. It has a symbol that says its ...
0
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0answers
92 views

Battery issues - suddenly critical level [Ubuntu 14.04]

Since a week I'm experiencing sudden drops in battery level: it will be around 50-60% and suddenly drop to less than 10% and I get the message the battery level is critically low. Sometimes it doesn't ...
0
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0answers
31 views

Power Statistics in Ununtu 14.04 shows me battery percentage = 0%. How to fix it?

in the past days I killed my netbook while booting, then I found that I can't turn it on unless it's connected to AC power. Power statistics tells me the battery is charging, the time to full is 0, ...
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1answer
99 views

14.04 - Laptop Battery Indicator does not show the right battery percentage

Despite my battery is full; the battery indicator shows it as '98%'. When I click on it it says "Battery(charged)". Is this a bug? And how can I resolve this issue? psi. My laptop is new & I do ...
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2answers
66 views

Dell XPS 13 Ivybridge, turns off randomly when on battery

My laptop works perfectly when it's plugged in but when I am on battery, it will turn off randomly. Usually after 2 or 3 hours but not always. It will occasionally not turn off but freeze completely. ...
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1answer
62 views

“Battery critically low” on desktop

I installed Ubuntu 14.10 on a Lenovo Thinkpad, which is a All-In_One Desktop without any batteries. System is working fine, up to 2 problems: Shortly after logon, the desktop is shown and even a ...
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0answers
361 views

Ubuntu 14.10 does not power off after shutdown

I'm running Ubuntu 14.10 on my Dell Inspiron 15z (5523) which until last week was running normally. Now after selecting to shutdown or restart it does not continue -eventually some output (as per ...
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0answers
97 views

After upgrade to 14.04 resume from supend fails with freeze

I upgraded my HP Probook 4730 from 12.04 to 14.04. (Graphics: Radeon HD 6400M/7400M Series, Driver: fglrx_pci). Under 12.04 suspend and resume worked mostly fine, but now its really broken: resume ...