Questions related to power management, particularly power saving measures.

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2
votes
2answers
4k views

Ubuntu 12.04 LTS drains my Samsung Series 9 900X3C ultrabook's battery extremely fast. Is there anything I can do to fix that?

The title basically says it all. My Samsung Series 9 900X3C ultrabook's battery is in the deep red around barely three hours after disconnecting it from the power - and during most of that time the ...
4
votes
2answers
562 views

Is there a way to run the laptop only on AC power without removing the battery?

Is there a way possible to run a laptop only on AC power without having the need to remove the battery i.e. to disable the charging as it is possible in Windows 7.
0
votes
0answers
37 views

Suspend-resume-shutdown errors

System Description: I am running a laptop (Dell Inspiron 14-5447) with Linux kraftlj-Inspiron-5447 3.16.0-31-generic #43~14.04.1-Ubuntu SMP Tue Mar 10 20:13:38 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux. ...
0
votes
1answer
108 views

Battery discharges while AC is plugged in

I have a problem with my VN7-571G-56N0. My battery is discharging while the AC is plugged in. If i plug in the power cord, after i used the notebook with battery only, it charges it, but when i ...
0
votes
0answers
32 views

Suspend option disappear from shutdown dialog on Mint 17.1 Cinnamon [on hold]

Note, the question has been moved to http://unix.stackexchange.com/questions/193034/suspend-option-disappear-from-shutdown-dialog-on-mint-17-1-cinnamon Previously I have a "Suspend" option when I ...
0
votes
2answers
73 views

External USB hard drive, WD Elements, not power off itself

I own a Seagate Free Agent external hard drive for last 4-5 years. After plugged in and finished with file transfers I will click menu 'Safely remove'. Then it will gracefully shut down itself, ...
3
votes
4answers
2k views

Much lower battery life on Ubuntu and laptop heating up badly

I have the following config laptop: System model: HP Pavilion g6 Notebook PC Processor: AMD A8-4500 APU with Radeon HD Graphics (Quadcore 1.9Ghz) Memory: 6Gb RAM Graphics:AMD Radeon HD 7640G+7600M ...
0
votes
0answers
59 views

How to wake up my Laptop from sleep (suspend) when AC charger connected

In my area, electricity turned off for some periods, so I configured my laptop to goes to sleep when battery percent 10%, but I want it to wake up after AC charger is charging on. is there any way to ...
1
vote
0answers
52 views
+50

Automatic wake from suspend when power restored to laptop

I'm using a Chromebook with Ubuntu 14.04.2 LTS installed as an embedded system of sorts. I've figured out how to have it automatically suspend when disconnected from power by adjusting the power ...
57
votes
17answers
52k views

How to prevent my screen from either dimming or the screen-lock starting when watching YouTube?

My screen brightness used to dim after a few seconds to preserve battery. This is default in Ubuntu 12.04. However when watching video it should not dim. This works correctly when I watch videos ...
0
votes
0answers
25 views

How can I wake up my computer from suspend?

After the latest update, my machine isn't waking up from suspend, and I have to hard-reboot it. This only happens sometimes, and I can't tell under what exact circumstances it happens. I think it's ...
0
votes
0answers
13 views

Action on low power when computer is sleeping

I usually suspend my laptop. But I don't know what my netbook does when the power is critically low and it is sleeping (maybe it turns on and performs poweroff process or it just stops power supply of ...
1
vote
0answers
26 views

Acer Aspire power management

I'm working to fix my Acer Aspire One netbook so that power management is working. Currently, it goes to "suspend" when either the lid is closed or it is idle. However, it must still be using ...
0
votes
1answer
75 views

Maas Check Power State - Error: Unknown power_type 'ether_wake'

I have etherwake installed and Maas can use it to power on the nodes, but it can't shut them down and the "Check power state" button yields the error: Error: Unknown power_type 'ether_wake'. Am I ...
1
vote
2answers
58 views

14.10: Battery indicator stuck on 64%

Yesterday I saw that when I plugged my laptop the battery indicator still showed me that I was on battery life instead of direct power. The percentage was 65% and after a few hours on power the ...
0
votes
0answers
21 views

Disable USB port

currently I have a pcDuino3 running Lubuntu 12.04 and I have some usb devices attached to it. I was wondering if it is possible to disable power to specific USB ports. I have looked at other methods ...
1
vote
0answers
32 views

How to use UPS with Ubuntu 14.04

Hello I have a UPS but can not see what procedure the battery and how to remain percent spending. Here I attach some photos looks like the battery of Ubuntu 14.04 The battery once it exists, and ...
0
votes
0answers
84 views

NVIDIA force GPU to AC performance state

I have a Dell M6800 and a K4100M and Optimus disabled on 14.04. When it is not on the official DELL 230W charger, the system will limit the GPU to lower power states. Even when just on battery, the ...
0
votes
0answers
15 views

How to disable SSD power down when suspend to sleep?

I have a laptop with a brand new SSD. And I read hint about disabling hibernation (I don't use it) and even let the SSD powered on while in sleep mode. The latter activates Active Garbage Collection ...
1
vote
1answer
108 views

What commands the suspend item in system menu really launch?

On my laptop trying to go in sleep mode using the Unity Sleep item (or closing the lid for what it is worth) does not work well (it goes in suspend mode very slowly and after that I am unable to wake ...
1
vote
1answer
44 views

How can I tell Ubuntu 14.10 to do nothing when I close my laptop lid?

The issue is solved temporary using the method in this forum, but only if I have fresh boot, if i suspend my laptop and wake it again, Ubuntu will ignore my rules, and suspend when i close the lid. ...
0
votes
0answers
16 views

System no longer shuts down or wakes up from suspend after enabling hibernate

I recently tried to enable hibernation in Ubuntu 12.04 for my Acer-Aspire-S3. This resulted in catastrophic disaster--the laptop no longer shuts down correctly (it freezes at the Ubuntu logo) nor ...
4
votes
2answers
400 views

Laptop battery always discharging

I have a fully up to date Ubuntu 14.04 on my Asus X550DP laptop. My problem is that the battery is always discharging. When I plug the AC adapter in, it charges battery up to around 96% and stops ...
0
votes
0answers
11 views

Conflict in Power Settings rating and Battery reading in menu

I have conflicting battery status readings when viewed in the dropdown user menu vs that shown in the Power Settings dialogue (which is the correct reading of the two). In fact, the status in the ...
0
votes
1answer
55 views

hdparm will not set spindown for disks 14.04 server

I have 4 HDD, one WD and 3 Identical generic brands. I have edited /etc/rc.local to change hdparm -B to 127 for the 3 generic drives (WD is unsupported and probably handles itslef) and -S to 180 for ...
0
votes
0answers
36 views

Ubuntu 14.04 power manager not working

The power manager has suddenly stopped working on my Ubuntu. It shows plugged in and 100% charged all the time. I'm using dual-boot with Windows 7 and the Windows power management tool is working ...
1
vote
1answer
439 views

Ubuntu 14.04 does not recognize my battery

For the last 3 years I've been using a Samsung notebook. I was using Ubuntu 13.10 until 2 weeks ago. Then I decided to format and install Ubuntu 14.04 LTS. Everything was working great, until the ...
6
votes
1answer
131 views

Entirely disable suspension (at kernel level? - has to be independent of used DE and login state!)

Once again I need a workaround to deal with my almost broken notebook graphics card: It does not wake up after suspending! The Ubuntu 14.10 system is waking up, but the display stays off, so I have ...
0
votes
0answers
51 views

Please help! Blinking orange lights on laptop, battery not charging

I have just made a fresh Ubuntu 14.04 installation on a Toshiba Satellite L735 laptop. When I turn on the laptop and it is plugged to the socket, the battery icon does not show ("Show battery status ...
2
votes
1answer
65 views

Unable to revive computer from suspend mode in Ubuntu 14.04 on Thinkpad

I have recently installed Ubuntu 14.04 on my Thinkpad E440. Though I generally don't use Suspend option, but whenever by mistake I select that option, my laptop goes to low power state as expected. ...
0
votes
0answers
12 views

pm-suspend works, but clicking on “suspend” from GUI menu does nothing?

If I run sudo pm-suspend, it suspends correctly, and resumes too. No issues. But the OS timeout setting of "5 Minutes" from the "Power" menu in settings does not suspend the machine. Also, the GUI ...
0
votes
1answer
10 views

Power Management - OnSleep hook

Is it possible to have a script invoked when my PC decides to sleep or when it is put to sleep manually. What I am trying to do is to have a script that will take down my VPN and the SSH key, when ...
12
votes
5answers
52k views

How do I disable my system from going to sleep?

I am getting a web server setup at home on an older AMD 2400+ desktop. I have Ubuntu 11.04 installed and running however, after a time, I can no longer browse to the server. When I go to the keyboard ...
0
votes
0answers
42 views

Hardware incompatibilty HP proliant DL380 e Gen8 and pacemaker/corosync . Ubuntu 14.04 LTS

We have 4 servers HP proliant DL380 running Ubuntu 14.04 LTS. We have frequent kernel panics in all the servers at the same time, and we consider that are related to the way the these servers manage ...
5
votes
6answers
11k views

Keep Ubuntu Server running on a laptop with the lid closed?

I decided to use my Eee PC 1001HA as a home server. I have it connected through Wi-Fi to the router, running Ubuntu Server 12.04. Everything works fine except this annoying problem: when I close the ...
0
votes
0answers
45 views

Ubuntu machine waking up immediately after suspend, need help solving it!

So I've Googled a bit and it seems this is a well known issue. I just need some assistance with my particular setup. I have Ubuntu 14.04 loaded onto a machine that I use as a Plex Server. I've ...
0
votes
0answers
15 views

Problems opening Ubuntu 14.04 on my laptop (when using battery power)

I had Ubuntu 14.04 installed on my laptop, but for some time (possibly since before 14.04 was installed) did not use battery power, relying on the power adapter. I recently bought another battery and ...
4
votes
2answers
141 views

Enable full performance on Sandy Bridge laptop

I have 2nd gen Intel i7 laptop. I use Thermald and tlp for managing battery life (they are great!). However, sometimes I don't care about noise and power consumption, and want the CPU to run at full ...
0
votes
0answers
69 views

Ubuntu loses network connection and dpms becomes re-enabled after unplugging AC adapter on Macbook Pro

On Ubuntu 14.01, when I unplug my AC adapter, the network connection is lost (even with connected to wired via eth0). Also, the dpms settings are lost. So even though I run "xset -dpms", that setting ...
0
votes
0answers
35 views

Ubuntu 14.04 LTS Keeps Shutting Down Following Feb. 2015 Updates

I've never had this problem before, but the Ubuntu 14.04 LTS keeps shutting down if I'm away from the keyboard for any meaningful length of time. This has been the case since the most recent Feb. ...
-1
votes
3answers
565 views

How to write a script to “listen” to battery status and alert me when it's above 60% or below 40%?

I want to make a tool that alerts when battery is below 40% or above 60% so I can start/stop charging accordingly. I know some tools alert when battery is low, that's not enough. Is there a tool that ...
3
votes
4answers
6k views

How can I disable usb-autosuspend for a specific device?

This is related to the issue discussed in this question. Summary: the mouse freezes when operating on battery since it is autosuspended after a certain time and needs more time to wake up. Disabling ...
0
votes
0answers
71 views

xubuntu 14.10 failing to sleep after inactivity - power manager error

After waiting well beyond my scheduled "sleep when inactive" time, the computer is still awake. I wiggle the mouse and unlock the machine to find an error notification in the upper corner, it read as ...
0
votes
3answers
5k views

Automatic Reboot After Power Failure

I want a machine that loses power to automatically reboot when power is available. I've looked around and haven't found a solution that works for 11.04. Purportedly at one point you could do: echo ...
0
votes
0answers
22 views

Cannot boot to Ubuntu, Powercap/SELinux Issue

I am running Ubuntu (well, Lubuntu, really) on my home server, and all was tickety boo until a few days ago, when the OS stopped booting. Not being able to SHH in anymore, I hooked it up to a monitor ...
1
vote
0answers
39 views

Logind.conf HandleLidSwitchDocked

I've been trying to do a clamshell mode setup for my computer and I've seen many suggestions to use HandleLidSwitch=ignore. However this is not really what I want to do since I only want to keep the ...
6
votes
1answer
140 views

Is it possible to disable a notebook's LEDs temporarily? (HDD, Power, Charging)

My question is whether it is possible to run a terminal command (or anything else) to disable a laptop's indicator LEDs. I have LEDs for CAPS, NUM and WiFi which are off anyway. But when it is dark ...
3
votes
4answers
1k views

DisplayPort monitor not detected if switched off and on again

I am running Ubuntu Desktop 14.04 on a desktop PC with a Nvidia GTX 660 connected to a HP LP2475w 24" monitor over DisplayPort. It boots up fine, but if I switch off the monitor and switch it on ...
1
vote
0answers
25 views

My Sony Vaio VGN-N31M/W will not boot without the power cable plugged in

My Sony Vaio VGN-N31M/W only boots with the power cable plugged in. The screen simply hangs on the Grub screen, it loads when acpi is disabled but the laptop is then very slow and can not recognise ...
0
votes
0answers
35 views

Suspend doesn't work after cloning SSD with Ubuntu to the identical MacBook Pro Retina

I have cloned the whole SSD (using the dd command) with fresh Ubuntu 14.10 installation from one MacBook Pro 15" Retina Mid 2014 to the identical MacBook Pro model (the old MacBook's screen was ...