Questions related to power management, particularly power saving measures.

learn more… | top users | synonyms (1)

0
votes
0answers
18 views

Since 16.04, I don't have 'when the lid is closed' options in power settings

Old OS/kernels: Ubuntu 15.10 with 4.4 kernels manually installed. New OS/kernels: Ubuntu 16.04 (no custom kernels, so 4.4 in place). Since upgrading to 16.04 it doesn't suspend correctly. when I open ...
0
votes
4answers
207 views

With Ubuntu 16.04 laptop doesn't suspend when lid is closed

I have a Dell 7737 laptop, and with Ubuntu 16.04 it no longer suspends when the laptop lid is closed. With 14.04 closing the lid put the laptop to suspend as expected. However, I reloaded the system ...
0
votes
0answers
26 views

Problem shutting down or restarting after suspend.16.04

Yesterday I noticed when I went to restart my laptop, it wouldn't. The computer is a brand new Dell XPS 13 9350. After looking into some things I noticed that it would only happen (Not shutting down) ...
10
votes
6answers
23k 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
40 views

Battery life reduced after upgrade to kernel 4.4.8 (16.04 LTS)

I upgraded from 4.4.0 kernel to 4.4.8 due to unability to suspend/hybernate my Ubuntu 16.04 LTS on Lenovo z51-70 and now it would seem my battery life has somehow halved. I used to be able to have 2.5 ...
0
votes
0answers
14 views

Screen re activated imidiatlly after idle

After upgrading to Ubuntu Gnome 16.04 LTS, the screen power saver started to malfunction. When the desktop is idle, it turn off the screen as usual, but a second later it turns the screen back on. ...
2
votes
1answer
50 views

Auto dimming laptop keyboard backlit when idle

On Windows 10, my laptop's keyboard backlit automatically turned off after a minute or so of inactivity. As soon as any activity occurred, they turned back on. On ubuntu, if I run the following echo ...
0
votes
2answers
570 views

Asus zenbook UX303UB does not resume from suspend (ubuntu 14.04) when charging

I've just purchased Asus Zenbook UX303UB which came with Windows10. I replaced the original system with Ubuntu 14.04.03 LTS and now I have one issue - the laptop does not resume from suspend when I ...
2
votes
1answer
210 views

Why isn't Hibernate in Ubuntu 16.04 working and how to fix it?

I have Kubuntu 16.04, I've tried the steps from the ubuntu 16.04 wiki, but the sudo pm-hibernate terminal command did nothing and creating the ...
0
votes
1answer
13 views

How do I configure the low battery notifications?

My laptop routinely runs between full and critical charge a few times over the course of a day (yes, it's old). Before I updated to 16.04, Cinnamon used to notify me at: 20%, then again at 10%, then ...
0
votes
1answer
44 views

Laptop not properly suspending after I close lid

Dell Inspiron 3542. When I close my laptop lid and put it in my bag, I often take it out later to find it extremely hot and with the battery drained. I also often find that my monitor turns on ...
6
votes
4answers
4k views

How to shutdown Ubuntu after (2 hours) of idle?

Running: Xubuntu 14.04 32bit. I have read several outdated, not working, working different that I want answers here and elsewhere. I had a script that resulted in shutting my Laptop down at boot time ...
1
vote
1answer
117 views

Ubuntu 16.04 is not providing working suspend or hibernate feature

I previously used 14.04 and i used to suspend when ever i am done and need to resume my task later . That shuts my machine down(except the LED indicator) which didn't consume power and no heating so i ...
2
votes
2answers
49 views

Can I have a countdown window show the time until next suspend?

Occasionally I leave my computer unsuspended when I need to go somewhere but I am leaving it with people I absolutely trust and I will be back shortly so no real need to suspend (like if it's family ...
0
votes
0answers
9 views

laptop screen suspends after unplugging charging cable, also disables wi-fi connection : ubuntu 14.04

Whenever I unplug the charging cable cord from my laptop(Lenovo G580), the screen temporarily suspends, after blinking 1-2 time(s). Then I press spacebar (or maybe any key can work) and screen ...
13
votes
2answers
6k views

Maximum CPU frequency stuck at low value

I have observed a problem with Ubuntu 13.04. The problem was not there on 11.10 I used earlier. The maximum CPU frequency is stuck at 2GHzon my Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz (Dell Lattitude ...
0
votes
1answer
49 views

BayTrail CPU and Ubuntu 15.10

I have a machine with an Asrock q1900b-itx mobo and I'm experiencing random freezes of the system. By freeze I mean everything hangs and there is absolutely nothing that can be done except reset. I've ...
0
votes
2answers
708 views

Setting to High Performance

When I had Windows 8.1, there was a power option for "High Performance" which allowed higher performance at the cost of power supply. Is there a way to set my power option to "High Performance" on ...
0
votes
1answer
22 views

Power management dies after suspend in Kubuntu 15.10

Ever since I upgraded to Kubuntu 15.10 from 14.10 power management dies after waking up from suspend (to disk or ram). The only thing that still works is dim display but it won't even un-dim. Screen ...
0
votes
0answers
80 views

How do i unrestrict battery charge percent on a lenovo running ubuntu?

I recently bought a Lenovo z51, and later used the battery management program that came with it to reduce the max charge to 60%. I have since than installed Ubuntu 14.04 and uninstalled windows. I now ...
0
votes
2answers
286 views

Bad battery life on Xubuntu 16.04 Lenovo T460s

the battery life of my new Lenovo T460s is very bad (about 4,5h with a little bit browsing and half display contrast). Xubuntu 16.04 shows two batteries (SANYO 00HW022 and SANYO 01AV405). They were ...
-1
votes
0answers
68 views

Ubuntu power management for Skylake (ThinkPad P70) [closed]

This article worries me: http://mjg59.dreamwidth.org/41713.html I am on Ubuntu 15.10 with kernel 4.2.0-35-generic, using an Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz inside a ThinkPad P70 and I have ...
0
votes
0answers
18 views

Save battery by setting apps in inactive workspaces into a state like minimized

I'm interested if it's possible to make GUI applications on inactive workspaces (Unity) to behave like minimized GUI applications (is it the idle state?) in order to save battery life. What I mean ...
15
votes
6answers
92k 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 ...
4
votes
5answers
11k 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
20 views

How to force enable Turbo Core (AMD) on Ubuntu 15.10?

I'm running a Samsung Ativ Book 9 lite with Ubuntu 15.10 installed. The processor is supposedly equivalent to an A6-1450 Temash 1.0 GHz (1.4GHz boost) The problem I'm having is that turbo mode only ...
0
votes
2answers
87 views

Is there a 'Power Monitor' for Ubuntu GNOME?

I am running Ubuntu GNOME 15.10 with GNOME 3.18, and there is one thing lacking, a power monitor tool which will display the status, the one in Ubuntu MATE looks like this: Ubuntu (Unity) also ...
0
votes
1answer
13 views

Playing video prevents sleep on low battery

When a video instance is displayed (firefox/chromium html5 video, openshot video editor etc.), the computer does not go to sleep under any circumstances, and it is even forced to stay until the ...
2
votes
2answers
4k views

Lubuntu 14.04 Tired about suspend e hibernation “power manager not authorized”

Below the post, last configuration I used, it seems works well. I've Lubuntu 14.04 installed on my netbook (aspire one ao-532h). I am using it like a desktop with external display and input devices. ...
-1
votes
0answers
40 views

Turn off screen by pressing power button [closed]

On Ubuntu 16.04, I tried remapping the power button to turn off the screen (similar question: Turn off screen by pressing the power button): /etc/acpi/events/powerbtn: event=button[ /]power ...
0
votes
2answers
106 views

Ubuntu doesn't look like sending power to an usb port used by a device that uses 2 usb ports to function

I'm connecting a Lenovo Thinkvision Displaylink USB external monitor to a Lenovo Thinkpad T450s. It works fine when I connect the screen to an AC powered USB hub connected, but when I connect the ...
1
vote
0answers
69 views

Can't resume after suspend and power off issues with ubuntu 14.04

I installed a fresh copy of Ubuntu on my desktop computer and now I face several power related issues: Can't resume after I suspend the system: When I suspend the system, it screen goes blank and ...
0
votes
0answers
48 views

Can't power off the computer running Ubuntu 14.04 LTS

I know this question has been asked so many times. For 2 days I keep trying to figure out how to shut down and power off my computer but it just wont power off. When I click "Shut Down..." from the ...
0
votes
0answers
20 views

Ubuntu 14.04 panel shows battery level as arithmetic mean of laptop and bluetooth mouse levels

I have two notebooks (Asus Zenbook and Lenovo Thinkpad) with Ubuntu 14.04 installed and both show the same behaviour: The battery level indicator in the Unity panel shows the exact arithmetic mean of ...
0
votes
1answer
27 views

Lenova Thinkpad power button does nothing

I have installed Ubuntu on many computers, both desktop and laptop, and the power button opens the power menu asking what to do. However, I just got a Lenova Thinkpad T410i secondhand from a friend. ...
1
vote
1answer
44 views

Lenovo b50-10. unclaimed hardware

Since installing linux mint 17.3 the following is not working: wifi (stops after a few minutes), bluetooth, shutdown or hibernate, DVD not mounted. I have tried all the solutions I've found on ...
5
votes
3answers
173 views

i3 throttled at 500Mhz when battery under 30%

I have the following problem. As soon as the battery drops below 30%, the CPU is being throttled to 500Mhz. As soon as I plug in the power adapter, it goes back to normal. The laptop is a Lenovo ...
1
vote
0answers
47 views

Laptop not resuming after suspend

Today, I got a couple updates to my laptop running Ubuntu 15.10. Now when I suspend my laptop either with the suspend button or by closing the lid, it doesn't resume after I open the lid or touch ...
0
votes
2answers
142 views

To control battery at a certain capacity (for ex.20%) then the laptop will be automatically standby or hibernate for long-lasting the battery

I would like to control for setting my battery at a certain capacity (for ex.20%) then the laptop will be automatically standby or hibernate for long-lasting the battery. Is there any solution, ...
2
votes
5answers
3k views

Laptop Battery Draining Too Fast. Laptop is too hot

I have HP ProBook 4540s with CPU Intel(R) Core(TM) i3-3110M and GPU AMD Radeon HD 7650M and Intel(R) HD Graphics 4000. (Intel® Ivybridge Mobile also.) OK, the problem is that the laptop is getting ...
0
votes
0answers
16 views

How configure Ubuntu to suspend after inactivity based on time of day?

I know we can configure Ubuntu to go to sleep after being inactive for "x" amount of time. But I want that to be based on time of day. Say, suspend computer if it has been inactive for 1 hour and it ...
0
votes
1answer
37 views

Laptop battery high/low alarm

My laptop battery didn't last half as long as I had hoped and it is an internal one. That is, it is very inconvenient to replace. I would like my replacement battery to last as long as possible, and ...
15
votes
6answers
41k views

How can I prevent iwconfig power management from being turned on?

I am affected by this bug: 869502. A workaround which seems to stop the kernel panics for me is to disable wlan0 power management: sudo iwconfig wlan0 power off However it seems to automatically ...
0
votes
1answer
3k views

Ubuntu 14.04 draining battery very quickly

I know there are several other questions very similar to this, but I feel that questions like this are specific to the system you are running and so there is not really a "one size fits all" type of ...
0
votes
0answers
31 views

Suspend Troubles on Ubuntu 15.10 32-bit

I am running Ubuntu 15.10 32-bit on my Acer C720 chromebook. The screen keeps on turning off and the system keeps on suspending even when I set both the "Suspend when inactive for" settings in the ...
135
votes
12answers
134k 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?
10
votes
3answers
4k views

How can I enable automatic resume on lid open?

My problem is the opposite of what is described in How to prevent resume from sleep/suspend on lid open?. If I close my laptop's lid, it automatically suspends, but when I open it up again, nothing ...
1
vote
0answers
19 views

Battery Status not updating

After I installed Ubuntu 14.04 (before I had Ubuntu 13.10), the battery indicator stopped working properly. It always shows the battery level that was at the start up (when I open the laptop and boot ...
4
votes
2answers
10k views

How to prevent my screens from turning off, when the screen is locked?

I would like to have my screen fully powered at all times, but it goes to standby once I lock my PC.
0
votes
1answer
3k views

Disable automatic screen dimming

I currently have three computers running Ubuntu. With two of them, If I don't touch the mouse or keyboard... nothing happens. However, with the third, the screen gets dimmer after about 60 seconds of ...