Questions related to power management, particularly power saving measures.

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1answer
48 views

Does Ubuntu 14.04 save laptop battery?

Does Ubuntu 14.04 save battery on my laptop HP ProBook 4540s? My search revealed the following: When working on ac then the command cat /proc/sys/vm/laptop_mode returns 0, and if the battery 5. This ...
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0answers
18 views

Laptop fails to suspend or hibernate, wakeup detected in Ubuntu 14.04

I installed Ubuntu 14.04 with gnome on my Thinkpad T410. To my surprise, it didn't have any option to suspend/hibernate the current session. So i installed pm-utils and also added extension which ...
0
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0answers
5 views

System goes to suspend mode on plugging out charging

I am using ubuntu 12.04 LTS. Whenever i plug out my charger, i see Low battery notification (even when my laptop is fully charged) and then my system goes to suspend mode. Please let me know if this ...
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0answers
43 views

ubuntu 14.10 issue with suspend

I have a Acer Aspire E5-571G-52FL and when try to suspend (when lid is closed for example) it not wake up after that. Only black screen and nothing. Could you please help? Thanks! 3.16.0-33-generic ...
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2answers
163 views

Black screen on laptop lid open after update to 15.04

I suspend my laptop by closing the lid, but when I open it my screen stays black, when I should be prompted to enter my xscreensaver password. The screen is "on" because I can switch TTY using ...
0
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1answer
16 views

How to save battery life in Dell Vostro 3446 (Ubuntu 15.04)

I have both Windows 7 and Ubuntu 15.04 on my Vostro 3446. I noticed that when I'm on Windows 7 I get easily 4-5 hours of battery life but when I'm on Ubuntu, it barely lasts 1.5-2 hours. I cam across ...
1
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0answers
12 views

MAAS Power-on problem IDRAC IPMI 2.0

I'm currently having a problem in getting MaaS (v1.7) to properly provision a Dell PowerEdge R630 server. The MaaS vm itself is able to detect the server automatically, and once the dell server boots ...
3
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0answers
23 views

Battery indicator disappears on connecting the power

I removed Unity and installed Gnome on Ubuntu 14.04. Now the battery indicator disappears on connecting power. The indicator-power-service appears to be there but it isn't working. On running it from ...
2
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3answers
836 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 ...
0
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1answer
21 views

How can I get a visual indication if I muted audio and the battery power is running out?

Is it possible to show a flickering or something else to indicate the shut-down process is nearby instead to get my attention with beeps? Ubuntu Gnome here.
1
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2answers
37 views

How do I turn off battery charging in Ubuntu?

I mainly work on AC power. Therefore Windows has the below utility to improve battery life for my scenario by disabling battery charging: How do I achieve this in Ubuntu? Thanks in advance!
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0answers
19 views

What is the proper/recomended way to handle laptop power management in Ubuntu?

I have seen many power management utilities/methods for Ubuntu. These are few of them: TLP CPU Power Scaling indicator-cpufreq cpupower Using powertop command Using laptop-mode-tools Intel i915 ...
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0answers
13 views

Xubuntu automatic suspend doesn't work

When I set xubuntu on my Asus Eee PC 1015BX to suspend after 15 minutes of inactivity, after that time I get "Power Manager not authorized" notification and it doesn't suspend. I had the same problem ...
0
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0answers
11 views

Is it possible to turn off Thinkpad dead battery led indicator?

I have old Thinkpad T61 with ubuntu 14.04LTS. Battery is completely dead (orange light is blinking all the time). But I don't want to replace it. I would like to turn off that indicator? Can it be ...
1
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0answers
26 views

Ubuntu 14 LTS server going to sleep/shutdown

We recently transitioned from Ubuntu 12 to Ubuntu 14 server installations and started to notice that the servers are occasionally go to sleep after couple of hours to days intermittently. ...
0
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1answer
23 views

Changing the command executed using suspend/standby in 14.04 LTS

I had some problems with my Thinkpad X200T not suspending under 14.04 LTS, after trying different solutions, it seems the easiest fix is to just execute sudo pm-suspend How would I go about making ...
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3answers
193 views

Power management for wireless unable to turn off in Xubunu 15.04 Vivid

I have tried everything that i can find on this site as well as the internet to turn off power management for the wireless card. ----------------My Current Conf-------------------- ...
1
vote
1answer
51 views

how to make hibernate work on 14.04?

My Ubuntu is 14.04 on Thinkpad T400. I try to run the following command for hibernation: $ sudo pm-hibernate It flashes and then return back to normal. Running pm-suspend-hybrid also ...
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2answers
49 views

Why is my system not waking up from suspend?

I freshly installed Ubuntu 15.04 sharing a preexisting home partition (Mint 17.1). However, in neither Mint or Ubuntu the computer is waking up from suspend mode. The status LED keeps blinking and the ...
0
votes
1answer
51 views

Wireless Power Manager Problems in Ubuntu 15.04

I've only recently upgraded to Ubuntu 15.04 from 14.04 and I noticed, unlike 14.04, my wireless power manager was turned on by default. It turns off ok with the sudo wlan0 power off But is back on ...
1
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2answers
79 views

What does “inactive” mean in “suspend when inactive for xxx mins”?

In system settings -> Power, what does "inactive" mean in "suspend when inactive for xxx mins"? If my laptop am running a hours long backup program while i am sleeping, is that considered ...
0
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2answers
18 views

What is the difference between the various methods of suspending in 14.04?

Are the following ways of suspending 14.04 the same? Choose menu for suspend close the laptop lid cover run pm-suspend. What are their differences? Any suggestions on when to use which?
0
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1answer
19 views

How is “thaw” different from “resume”?

In power management, what is "thaw"? How is it different from "resume"? Thanks.
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1answer
263 views

High number of interrupts on Ubuntu 15.04 on Dell XPS 13 2015 (9343)

In powertop I noticed a high number of interrupts 'INT3432', which I think would be either the touchpad or sound card. I am concerned on the effect on the power consumption and battery life. FYI I ...
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0answers
69 views

Laptop with Ubuntu Mate 15.04 screen dimming after 10 seconds

I watch movies on Youtube, Popcorn or XBMC and after 10 seconds when I have my laptop disconnected from power the screen dims. I know that there is an option in dconf-editor for longer timeout but ...
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0answers
14 views

Power plugged in/out starts suspending my usb Mouse

After system update of laptop (ubuntu 14.04) It starts suspending my usb mouse whenever i plugging in/out the power supply . If i plug out the mouse from usb and plug in againg then it starts working ...
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0answers
19 views

Gnome 3.14.4 won't blank the screen / suspend the system due to inactivity

I installed gnome-shell and ubuntu-gnome-desktop on top of Ubuntu and now the automatic suspension doesn't seem to work (I've been using GNOME now for some time and I'm not 100% sure if it worked at ...
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1answer
51 views

CPU frequency limit to 2000 on battery

I want set frequency to 2100 in battery mode but it have limit to 2000. I ran tlp ac and change CPU frequency with indicator-cpufreq to 2100 (and also check Performance) then check frequency with ...
2
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0answers
52 views

Battery will not charge past 59%. I have no access to Windows or lenovo softwares anymore

I have an Ideapad Touch u430 that came with AOE licence. As it was recommanded, I used the Energy Manager to enable the Economy mode (I don't remember the exact name) that makes your battery stop ...
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0answers
58 views

Need to press the power button twice for Ubuntu 15.04 to boot

I have a dual boot set up (Windows 7/Ubuntu 15.04). I've recently upgraded from 14.04 LTS to 15.04 and since then, I have to press the power button twice. The first time it goes to GRUB without any ...
0
votes
1answer
71 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 ...
9
votes
7answers
27k 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 ...
7
votes
2answers
1k views

Prevent temporally suspend/hibernate from script?

Is there any way to prevent temporally suspend/hibernate from a script? I want the screen to enter in powersave mode when appropriate, but the computer doesn't stop. Caffeine doesn't allow this: it ...
25
votes
7answers
58k views

How can I control HDD spin down time?

I have 2 HDDs in my PC. Ubuntu is turning off the secondary HDD very quickly after about 15 minutes, which is short for me. I need to control this time. How can I do it? I tried GNOME power ...
1
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0answers
221 views

Reduced battery life with ubuntu 15.04

I'm using a Lenovo Z-5070 Ci7. I had a battery life of nearly 4 hours when I was using Ubuntu 14.04 LTS. After updating to Vived Vervet (15.04) my battery life is reduced to nearly 2 to 2.5 hours. ...
0
votes
1answer
140 views

Wireless power management turns back on in 15.04

I have turned off power management for my wireless. I did that in /etc/pm/power.d/wireless. When I try to connect to a network, the power management turns back on. So the connection fails. I try: ...
0
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0answers
24 views

Unable to discover USB external HDD after entering power management

I have a USB-HDD attached to my box. The USB HDD will not be discovered by my linux after entering power saving. I already turned off the power saving through the command line tool, hdparm. However, ...
3
votes
3answers
656 views

Ubuntu 13.10 on Thinkpad slows down dramatically when power adapter is plugged in

When I plug in my power cable -- sometimes -- Ubuntu 13.10 immediately slows down in just about every way. This has been happening for months, but I only recently finally connected the dots, in part ...
5
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6answers
13k 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
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1answer
71 views

How To Get Rid of This? Ubuntu is Definitely Consuming More Power Than Windows! [duplicate]

System details: Intel Core i5 2.50GH, Nvidia, 2GB RAM, 32bit O/S for both Linux and Windows. Well I have been using Ubuntu 14.04 LTS for nearly 1 week. I have noticed whenever my laptop runs on ...
0
votes
1answer
49 views

Cant Change power profile ubuntu 15.04

I was using following command to change graphics card power profile in Ubuntu 14.10 got from Radeon HD 6950 temperature is way too hot. echo low > /sys/class/drm/card0/device/power_profile But ...
1
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1answer
170 views

Ubuntu 15.04, pm-utils do not look into /etc/pm/power.d/ anymore, what instead?

Since upgrade from 14.10 to 15.04 my custom script which I used to setup proper thermal profile mode for my laptop ceased to work, which I believe is because pm-utils do not respond to AC/BAT ...
3
votes
1answer
150 views

Does Systemd read /etc/pm/…?

Do systems using systemd read and execute scripts in /etc/pm/sleep.d/ ? I'm starting to concluded the answer is that systemd ignores these scripts. If this is true what is the replacement? Update: ...
1
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1answer
2k views

Message {1.079026} ACPI PCC probe failed; starting version 219

I am running Ubuntu 15.04 (Vivid Vervet) with 3.19.5-031905-generic #201504211114 kernel and GNOME Shell 3.14.4 on a Samsung NP370R4E laptop. When I boot up, I see [1.079026] ACPI PCC probe failed ...
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0answers
83 views

Vivid Vervet freezes after waking from suspend

After upgrading to Vivid my laptop (Lenovo y5070) freezes when waking from suspend. I cannot get a tty shell and after shutting down and rebooting with the power button, the mouse pointer is ...
3
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2answers
82 views

How to enable power failure notification?

I need to enable power (AC) failure (off-line) and power on (on-line) notifications, like this notification: I searched and tried to do that, but I didn't find any successful articles. I use these ...
0
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1answer
22 views

Disable faint of display Ubuntu 14.04

I want to know there is exist some way to disable faint of display brightness when I don't connected to energy network(I use notebook). I have already set on both pages Brightness and Supply to do ...
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0answers
16 views

What is difference beetwen dim screen and screen energy saving?

What is difference beetwen dim screen and screen energy saving? I see these setting in power managment panel
3
votes
1answer
710 views

How do I control the fan on a Apple Mac Mini?

I am running 12.04 LTS on Apple mini hardware (about 4 years old). The fan seems to run non-stop. "ThinkFan" is installed but I do not know how to use it in order to modulate fan speed. The ...
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0answers
190 views

Xubuntu 15.04 goes into sleep after powering up

Upgrade from Xubuntu 14.10 to 15.05 (Update history : 13.10 -> 14.04 -> 14.10 -> 15.04). The upgrading worked well. After rebooting the machine (Dell Inspiron 6000 - 10 years old) went automatically ...