Questions related to power management, particularly power saving measures.

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2
votes
1answer
991 views

Keep External HDMI Monitor ON

I am running XBMC (Frodo) on an Asus U47A laptop (Intel Sandybridge graphics) with Ubuntu 12.04. The laptop is connected to an older Phillips 27" tube HDTV via HDMI. What I would like is for XBMC to ...
1
vote
0answers
20 views

Xfce power manager in Xubuntu 14.04 doesn't react to my choices

Okay, so I chose to make it so that when my laptop lid closes and I'm on AC (my power cord is plugged in) it will do NOTHING. But when I close my laptop lid .. it just suspends. I've tried it like a 8 ...
0
votes
0answers
20 views

Power management advanced tool

I'm searching for a tool that has a lot of configurable options. It should be able to detect events like cable plug-in/out, save many profiles and change options like CPU frequency, screen brightness, ...
2
votes
3answers
5k 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
1answer
272 views

Could not stat the resume device file

I've copied one disk content to another disk and now when system boots I get this: resume: libgcrypt version: 1.5.0 resume: Could not stat the resume device file '/dev/sda6' please type in full path ...
-1
votes
1answer
18 views

How to make ubunu in power saver mode?

when i type this command in the terminal sudo aptitude install pm-utils to use power saver mode it tells me sudo:aptitude command not found what can I do to fix this ?
0
votes
1answer
24 views

What's the difference between putting display to sleep and switching off the display?

When I mess with my power options, I have the options: Put display to sleep when computer is inactive for: Switch off display when computer is inactive for: What is the difference between ...
0
votes
0answers
9 views

Automatic Screenlock keeping screen on, ignoring timeout setting

I'm on a Macbook Air 4,1 running 14.04, with surprisingly minimal trouble so far. However there is an issue with the screen - when I set the 'Lock' on, in 'Brightness and Lock', when I close the lid, ...
1
vote
2answers
2k views

Do I need to add a boot parameter to work around this kernel power bug on a Sony Vaio VPC-EH1S0E?

If i with dmesg | grep -i aspm have this: [ 0.503709] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 0.673564] ACPI _OSC control for PCIe not granted, disabling ...
0
votes
1answer
57 views

Go to sleep based on screen activity

So, the behavior I want is: 1. Screen goes blank when inactive for [specified time]. 2. Computer suspends when screen is inactive for [specified time 2]. With the default setup, these two can be ...
0
votes
1answer
27 views

How to consume less power in ubuntu?

I noticed when I installed Ubuntu that it consumed more power, so I want to know how to reduce power consumption.I want the steps please.
85
votes
11answers
65k views

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

I would like closing the laptop lid to be a no-op. How can I do that?
2
votes
2answers
369 views

xfce4-power-manager does not open

I recently changed my DE from Unity to XFCE. I really enjoyed it, but the power manager doesn't work. When I try to open it from the settings menu, I get the following error: Unable to connect to ...
0
votes
1answer
17 views

Ubuntu server detecting electricity outage?

I am in the planning stage for setting up my server and have some doubts. Firstly my network is something like this: One parent PC connected to the internet and 3 other child PCs which are not ...
4
votes
4answers
497 views

Shut down acts as restart?

I've installed Ubuntu (almost all latest versions), when my Acer Aspire V5-471 is want to shutdown from Ubuntu, it acts as restart/reboot. Refer to edit 2 for releases tried and edit 1 for tried ...
1
vote
0answers
350 views

Lenovo G480 has a 64°C temperature, should I worry?

My Laptop is a Lenovo G480 (20157) and came with Windows 8 pre-installed. I cleared it out and made Ubuntu 14.04 (LTS) my primary OS. Everything is awesome except the heating problem. My laptop burns ...
0
votes
0answers
27 views

Hibernation works only when connected to AC power

Please help me understand this part of syslog when I try to wake up from hibernation. My specification - 4 GB of RAM, 8 GB of linux-swap, intel core i5-4200U, NVIDIA GeForce GT 750M. The problem is ...
-1
votes
1answer
15 views

how to increase MaxPower of specific usb port

it takes long while to charge mobile phone by usb port. how do i specifically increase MaxPower of usb port ? this cmd help to understand MaxPower of usb port root@ROHIT-PC:/home/rnztx# lsusb ...
-1
votes
2answers
246 views

Cannot shut down Ubuntu 14.04 [duplicate]

this is my first time using Ubuntu 14.04 version. I'm not sure what I've done, but I can't shut down my laptop. But if I log in as the guest, then it will shut down if I press the button and I'm not ...
3
votes
4answers
8k views

The battery indicator in Unity panel not showing up

I installed Ubuntu 12.04 with Wubi. Well after being completely dazzled with the amount of free content in the Software Centre, I decided to go deeper and start messing with settings. Well after ...
6
votes
2answers
715 views

How do I get a wireless USB keyboard to to wake Ubuntu 13.10 from suspend?

My PC with Ubuntu 13.10 is set to suspend after 30 minutes of inactivity. Up until it suspends I can resume working at any time using my Logitech K400r wireless USB keyboard. The OS defect/problem ...
-1
votes
0answers
23 views

When I leave my laptop lid open, how do i may it so that it doesn't suspend? [duplicate]

It just keeps blackening out when I'm afk for 10 minutes or so. How can I stop that?
3
votes
1answer
35 views

Prevent machine from sleeping when SSH connections are on

I am trying to save power by switching desktops to suspend mode when they are inactive. But many desktops are also accessed via SSH by their owners. There is a wakeonlan solution deployed to enable ...
0
votes
1answer
40 views

Simulate power button using command?

When I hit the power button on my laptop (Ubuntu 14.04.1 without any modifications), I receive a pop window saying Goodbye, what would you like to do? Lock Suspend Restart Shutdown How can I get ...
2
votes
2answers
3k 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 ...
1
vote
0answers
61 views

Fan not working increasing CPU temperature

I have Dell Vostro 1014 laptop. I am using Ubuntu 12.04 LTS. The fan of my laptop is not working anymore and increases the CPU temperature upto 85 degree Celsius. I followed the solution given on this ...
-4
votes
2answers
131 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 ...
3
votes
1answer
185 views

Ubuntu wakes up automatically after suspending

I'm having this problem since Ubuntu 12.10/13.04 i think, now I have 14.04 and the problem stills. When I click the suspend button, the Ubuntu suspends normaly but after 1 or 2 seconds it turns on ...
0
votes
0answers
4 views

Wake up command as ordinary user

Yandex disk cloud drive daemon started via ~/.config/autostart/Yandex.Disk.desktop. It works well except the PC waked up after suspend. Yes, I work with /etc/pm/sleep.d scripts when I need to do ...
0
votes
1answer
2k views

Xubuntu 14.04, Power Manager, Screensaver

When my computer is inactive, I keep getting a black screen and the screen goes into locked mode asking for a password, even though in Power Manager I have "Never" set for actions and monitor and ...
0
votes
0answers
60 views

14.04 - Laptop screen goes blank when lid shut

I'll be totally honest, I have googled this question...I have read responses...but I'm still pretty confused...anyway... So, anyway, I want to hook up my laptop with HDMI to my TV...that part works ...
6
votes
5answers
9k views

Prevent screen turning off when watching video in XBMC [closed]

In 12.04, the screen never went to sleep while watching videos in XBMC. However after upgrading to 12.10 and changing no settings, it does. Is there any way I can prevent the screen automatically ...
3
votes
2answers
2k views

Ubuntu not is hibernating when lid is closed

I use Ubuntu 12.04 in my laptop. I'm trying to configure to hibernate when lid is closed. However, not is working. I did the following steps to solve the problem: I enable in ...
1
vote
1answer
68 views

14.04 LTS can't suspend anymore

I changed the "what to do when laptop's screen is closed" option under Power last night. It was at suspend and I switched it to do nothing. The problem is, I can't get it back to suspend anymore! ...
15
votes
1answer
2k views

Is there ongoing work in the kernel team to improve battery life under linux?

I have read in some forums that the kernel team is working on improving battery life and energy efficiency in Linux. Unfortunately our community really lags behind Windows and Mac in that regard. I ...
0
votes
1answer
121 views

Plugged in, battery not charging, not running down

This morning, after being plugged in all night, my Asus N550J, Xubuntu Saucy, showed 28% battery. When it is plugged in, it shows the Charging icon, yet the percent charge never goes up. When it is ...
14
votes
1answer
6k views

How to change critically low battery value?

I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it ...
6
votes
3answers
5k views

How to turn off screen (DPMS) together with locking session in KDE?

First of all, I'm aware a similar question for GNOME is asked here: "Switch off laptop backlight when locking screen". Objective I would like to turn off my screen on locking the session for power ...
2
votes
3answers
11k views

How to make my screen brightness not change when I plug my laptop in

I do not want my laptop to change brightness when my laptop power is plugged in or unplugged. I set my brightness based on how bright my surroundings are. If I am in a dark room, I set my brightness ...
25
votes
7answers
49k views

How do I completely turn off screensaver and power-management?

I looking for a method to turn-off the screensaver and powermanager but from the command line. I'm aware this can be done via the GUI screen - but can this be done via the command line or via some ...
0
votes
1answer
2k views

battery icon / power indicator not shown in menu bar after upgrade to 12.04

Since the upgrade from 11.10 to 12.04 the battery icon / power indicator is not shown any more in the menu bar. I went to 'system settings'-->'power' and tried to set 'show battery status in menu ...
0
votes
0answers
16 views

Set Brightness to 0 when lid closes

is there a way of setting the brightness level to 0 or blanking the screen when I close my lid (without suspending the system). I just prefer it that way, since I listen to audiobooks while driving ...
0
votes
2answers
33 views

let utransmission run even after lid closed?

How do I set my settings such that even if I close my lid (Laptop) My downloads don't stop or pause in utransmission I have set the setting in power options to not suspend after closing lid still ...
2
votes
1answer
70 views

Please explain the parameters 'noexpose' and 'cycle' in xset

I have been trying for a long time to prevent my screen from blanking every 20 minutes. I understand there are many interlocking layers of applications that can do this and it is not straightforward ...
2
votes
1answer
5k views

Enabling the power management for SATA link [duplicate]

After tearing down my laptop, I came to know that most of the heating issue in my laptop is caused by HDD. Powertop is also showing the same problem. I am seeing significantly cooling after activating ...
1
vote
2answers
158 views

Asus UX31 ultrabook suddenly shuts down when below 50% battery

I've heard over the years that this computer had issues with the BIOS settings but that by 13.10 it had been cleared. It never used to happen on 13.10 but now that I'm on 14.04 it started showing ...
1
vote
1answer
197 views

xset: unable to open display

for the longest time after about 5 minutes my screen would blank out. Now the screen will go blank after 5 minutes but then 2 seconds after that it will light up white and keep the laptop ...
-1
votes
0answers
26 views

Ubuntu sleeps and wakes repeatedly on critically low battery state

When the battery is critically low it just suspends itself and wakes again automatically repeatedly in a loop. And i need to be like very very fast to click the shutdown button to turn down the ...
0
votes
0answers
39 views

Ubuntu 14.04: hibernate consumes power

Upgraded from 12.04 to 14.04 (not new install). In 14.04, enabled display of hibernate choice in power menu. This works as well as pm -hibernate. Followed the steps in ...
8
votes
4answers
14k views

How to stop screen going black after 10 min

My OS is Lubuntu 13.04. After 10 mins of inactivity the screen goes black. What I did to stop it without effect: uninstalled xscreensaver completely in power setting I set to never blank the screen ...