Questions related to power management, particularly power saving measures.

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2
votes
0answers
368 views

“power off and on” specifc usb port [duplicate]

I am trying to power off and power on usb port in Ubuntu 12.04 without success. I tried the steps listed below: echo "0" > "/sys/bus/usb/devices/$port/power/autosuspend" echo "auto" > ...
3
votes
1answer
62 views

powertop color codes

I am running powertop in Ubuntu 10.04. It shows a horizontal bar near the top that displays something like: Wakeups-from-idle per second : 723.6 interval: 10.0s My question is, why is the ...
2
votes
2answers
2k views

Suspend doesn't happen when laptop lid closes - awesome wm

I've installed awesome as my windows manager. However, it doesn't seem to respect the power options from lightdm; if I'm at the login screen shutting the lid will trigger suspend. Once I log into the ...
1
vote
1answer
670 views

selectively deactivate (power off) pcie slot?

the title basicly says what I'd like to do: my machine has integrated HD4000 graphics and a more powerful PCIe card HD4000 is enough for everyday use, PCIe should be used only for gaming with ...
1
vote
1answer
109 views

Ubuntu Battery/AC Management

I would like to know if having the AC plugged continues to charge the battery while being 100%. I don't want my battery to wear out, and I don't want to have to remove it every time I plug the AC in. ...
0
votes
1answer
342 views

Ubuntu 12.10 w/ Kernel 3.7.0.7 and Open Source Driver RESUME/BRIGHTNESS CONTROL

I am using an Inspiron 7520. I got a AMD Radeon HD 7730m running in switching with an Intel 4000 HD. I have updated my Open source drivers with xorg edgers and x-swat. I am running on the kernel 3.7 ...
1
vote
1answer
545 views

Battery life: 90 min on Acer ultrabook / 12.10

i usually work on my Acer M5-481TG with Windows 8 x64 and recently installed Ubuntu 12.10 (x64) alongside with it. Unfortunately, the battery-life is roughly one and a half hour - which apparently is ...
2
votes
1answer
209 views

E: unable to locate power managment interface

I am very new to Ubuntu I am running Ubuntu 12.04 I tried to install the power management interface sudo apt-get install power management interface and i get E: unable to locate power ...
6
votes
4answers
9k views

How can I find out the current drive spin-down time?

I'm interested in manually adjusting my hard drives' spin-down times with hdparm -S to make them quieter at night. The first thing I need to know is what their current spin-down times are, to use as a ...
3
votes
0answers
191 views

How to tell if laptop was woken by rtc?

Say I set my laptop to wake every morning with rtcwake (e.g. echo $(date +%s 'tomorrow 08:00') > /sys/class/rtc/rtc0/wakealarm in a cron job or in /etc/pm/sleep.d/99-set-alarm.sh). Now, I'd like ...
4
votes
1answer
876 views

How do you prevent CPUs from being throttled when battery is taken out of Laptop (aka only on AC power)?

My laptop CPUs are throttled down to .8GHz instead of 2.5GHz whenever I am connected to AC only and not the battery. I tried using cpufreq-set and it allows me to set the speed when the battery is ...
10
votes
6answers
4k views

How can I disable backlight when I lock the screen?

When I lock screen, the display does turn black but the display isn't completely off. There is some light coming out of the display in screen lock mode but it get turned off when inactive for 10 ...
1
vote
0answers
134 views

Laptop refuses to power down or restart from top bar power icon

I am running Ubuntu 12.04 (32-bit) on a Dell Vostro 1700 laptop. When I click 'shut down' option on top bar far right button, it closes Ubuntu but won't shut down. It just goes to a low-power state, ...
2
votes
2answers
4k views

Disable USB keyboard wakeup

With the update from 11.04 to 12.04, my USB keyboard activity will wake Ubuntu from 'suspend'. I'd like to disable this. (My battery went dead due to some unexpected keyboard activity.) This didn't ...
4
votes
2answers
813 views

Suspend problems - Chromebook running 12.04.1 LTS

I've been running Ubuntu 12.04.1 LTS for a few days now on my Acer C7 Chromebook - and in general it's running great. However, I've noticed that when I try to suspend one of various things can ...
1
vote
2answers
107 views

Is there any security alarm?

I have friend that leaves an awful amount of time his laptop unattended. Its is not me, it would be stupid tip for thieves to ask this publicly if it was me :p. I was thinking of an alarm that could ...
2
votes
0answers
703 views

Lenovo u310 will not charge when turned on

I've looked around and had several friends have a look but we cannot figure this out. I am running Ubuntu 12.10 on a Lenovo U310. The laptop charges fine when the laptop is off but it will not charge ...
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 ...
7
votes
5answers
13k 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 ...
1
vote
1answer
551 views

MSI-6837D laptop goes to hibernation when the lid is closed

I am using Ubuntu 12.10 in my MSI-6837D laptop, when I close the lid my system goes to suspension/hibernation and I cannot bring it back. I just want it to do nothing if I close the lid. I think ...
0
votes
1answer
392 views

Why is Power Statistics showing grossly incorrect battery power? [closed]

Energy when full - 231.7 Wh Energy(design) - 81.2 Wh This also results in an incorrect value for Percentage - 31.3% This also conflicts with Time to full field (Thankfully !) I have never seen ...
1
vote
3answers
4k views

System won't shut down properly, stays in the plymouth screen

I have an older computer that I got from work when we upgraded to newer ones. I don't know the brand, it's kind of a mix and matched machine, but I can get some better info if necessary. Anyway, I ...
0
votes
1answer
25 views

Power on does not work when display is closed

Having a Samsung N230 Storm netbook runnning ubuntu 12.04 As I want to use only external devices (VGA Display, USB Keyboard, USB Mouse) and have the netbook acting as a "desktop" most of the time, I ...
2
votes
1answer
942 views

I need help with the battery Icon [closed]

I have a Toshiba Satellite L645D running Ubuntu 12.10 and it seems like Ubuntu like some other distros (Nadia, Debian) won't recognize my battery and I don't know the reason for that, it won't show ...
0
votes
1answer
91 views

Prevent Ubuntu 10.04 from locking display after few minutes of inactivity

My system is Ubuntu 10.04 Lucid Lynx. I looked under System/Preferences/Power Management and everything is set to Never. How do I change settings so I can let the screen stay on at least for 30 ...
5
votes
1answer
9k views

How to prevent XBMC from shutting down or suspending your computer?

Since I run XBMC as a program, and not standalone, I would just like it to exit when I click the power button. The default behavior is to show the shutdown menu, and I don't want to accidently shut ...
2
votes
0answers
34 views

How to wake-up / suspend (or switch-off) Ubuntu 12.10 Desktop system automatically at a particular time of the day? [duplicate]

Possible Duplicate: Scheduling StartUp and ShutDown Currently, I keep my Ubuntu 12.10 Desktop system continuously running as I have to download some data at a particular time which ...
1
vote
1answer
628 views

Lenovo Ideapad Z370 - Power reated issues

I have a Lenovo ideapad Z370 and I'm facing some problems. It consumes way more battery than it should, I got about 5 hours using Windows 7 and about 2 hours using ubuntu; If I try to install ...
0
votes
1answer
1k views

Cannot permanently prevent power saving blank screen on Compaq Presario C700 with Ubuntu 12.10

I have a Compaq Presario C700 which has a GRUB multi-boot for Ubuntu 12.10 (32 bit), Ubuntu 10.10 and Windows Vista. This machine is always run by mains electricity rather than by battery as I have ...
2
votes
1answer
1k views

What are the pros and cons with pm-powersave for saving power?

I don't know how much power my system consuming and My UPS also behaves in a strange way. So I googled and stopped at Ubuntu Power Management. Installed powertop and everything is fine. As mentioned ...
0
votes
1answer
653 views

Laptop battery doesn't last that long compared to Windows [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? I'm using Ubuntu 12.10 with Gnome 3.6 on a Dell Inspiron N5010 laptop, but I have a problem ...
4
votes
1answer
448 views

How to send an email when laptop battery is low?

Is it possible to send an email to myself when the laptop is on low battery power? I'm always online with my Android phone, but not always in front of the laptop, and sometimes I'm missing the ...
-1
votes
3answers
8k views

how to enable laptop mode tools in ubuntu 12.10 [duplicate]

I have a Lenovo z570 running ubuntu 12.10 with a battery life approximately 1hr 30 min. Please help me maximize the battery life of my lenovo
2
votes
1answer
190 views

How do I prevent my HDMI-audio-only connected GPU from powering off itself?

I have a PC running Ubuntu and XBMC with the following specifications: CPU - AMD A6-3500 APU - Radeon(tm) HD Graphics integrated discrete graphics card: AMD HD6400 I got the HD6400 just to have ...
3
votes
2answers
2k views

Have PM utils power.d scripts run all the time

The pm util power saving scripts only work when a laptop is on battery, not when it is plugged in to AC. Is there a way to make pm utils run all the time, regardless of whether the laptop is connected ...
0
votes
1answer
524 views

My mouse / keyboard response gets delayed if I don't use it all the time.

Occasionally my mouse / keyboard would take extra long to respond to input. If I moved the mouse or pressed a key it would take an extra second to respond the work normally. If I leave it alone for ...
1
vote
0answers
888 views

For some reason upsmon doesn't do shutdown

I use nut to monitor my ippon 800 UPS. Everything seems works, except shutdown. I can get UPS params with upsc command: ~ > upsc ippon-800 battery.charge: 0 battery.voltage: 12.50 ...
-1
votes
1answer
232 views

Connecting Power or removing it causes Ubuntu 12.10 to Hang and Crash

When I boot my machine on battery and later connect the power supply Ubuntu just hangs and crashes and vice verse. I run Jupiter 0.1.9 it never gave me any issue but yesterday I updated ubuntu there ...
1
vote
1answer
137 views

Where did the “Safe Removal” in the Disks (Disk Utility) application go in 12.10?

In the Disk Utility in 12.04, there is a "Safe Removal" option for removable hard drives. In the equivalent Disks utility in 12.10, this option has disappeared. Where did it go? How do I safely ...
3
votes
0answers
313 views

How do I disable the sleep button on my keyboard in U12.04? [duplicate]

Hello I have read Q and A : How do I disable the sleep button on my keyboard? but in Ubuntu 12.04 64bit has gsettings set org.gnome.settings-daemon.plugins.power button-sleep "nothing" gsettings ...
0
votes
1answer
532 views

Session locked, Kubuntu 12.10

After leaving my laptop for a while, my Kubuntu session closed. (I'm not sure which of the various timeout criteria caused it.) So I got a screen that said my session was locked and I needed to ...
1
vote
3answers
5k views

How to improve battery life on a HP Pavilion dv6?

I've installed Ubuntu 12.10 a few days ago and I have only been able to get up to one hour of battery life. When running Windows 7 I get up to 3-4 hours. My screen is ultra bright, even though the ...
2
votes
1answer
1k views

Permanently disable CD drive [duplicate]

Possible Duplicate: disable the cdrom in Ubuntu 11.10 OS I have no use for a CD drive, ever. Yet it exists, consumes power, opens inadvertently when in its case or in my bed and makes noise ...
1
vote
2answers
4k views

Battery life starts at 2:30 hrs (99%), but less than 1 minute later is only 1:30 hrs (99%)

After searching this and other forums, I haven't seen this same issue listed anywhere for Ubuntu 12. Prior to installing Ubuntu 12.10, my Netbook (Acer AspireOne D250, SATA HDD) was consistently ...
-1
votes
1answer
1k views

Laptop battery charging capacity reduced to 52%

I have been using Ubuntu 11.04 on DELL Inspiron 14R (N5010) laptop for last three months. Before I switch to Ubuntu my laptop battery used to give 2.5 hrs to 3 hrs back-up. But since I have been using ...
2
votes
1answer
4k views

How to access gnome-power-manager in Lubuntu?

I have decided to replace Xfce4-power-manager with gnome-power-manager in Lubuntu 12.04 (didn't knew how to disable the tray icon in fact), which I did using synaptic, and now it shows: But ...
1
vote
0answers
75 views

Ubuntu 12.04: Virtual console is dimmed [duplicate]

My fresh installation (with updates ...) of ubuntu 12.04 (64bit, Desktop) automatically dims the virtual console as soon as a switch to one. After pressing ctrl+alt+fX, the screen starts dimming until ...
0
votes
3answers
807 views

How do you control how hybrid suspend works?

I would like hybrid suspend to act a certain way. If I add the code # Always use suspend_hybrid instead of suspend if [ "$METHOD" = "suspend" ]; then METHOD=suspend_hybrid fi PM_HIBERNATE_DELAY=XX ...
3
votes
2answers
958 views

Alarm clock from suspended mode

I want my laptop to wake up from suspended mode in the morning and alarm me to wake up using my mp3 file. How do I do it? I tried apmsleep, but it doesn't work cause my PC doesnt have "suspend to ...
1
vote
1answer
896 views

no power notifications with i3wm

I use Ubuntu 12.10, but changed to the i3 window manger. It works great, but I do not get the normal "low power" notification. Notify OSD works as expected (I tested it per notify-send). How can I ...