Questions related to power management, particularly power saving measures.

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163 views

Lenovo z50-70 “dust removal” (reverse fan) on Energy Manager with Ubuntu?

I have a Lenovo z50-70 and under Windows 8.1 and Windows 10 I had the "Lenovo Energy Manager" software with a "dust removal" function, that basically made the fan turns backwards to shoot the dust ...
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1answer
37 views

Running xfce4-power-manager as daemon with ubuntu 14.04 and awesome

I'm running default ubuntu 14.04 in combination with awesome WM 3.5.9. To enable proper suspend when I close my laptop lid I enable xfce4 after login through the following awesome command which makes ...
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0answers
47 views

Ubuntu Touch - setting the low battery warning level and behavior?

I had always assumed that if a battery is full, and a smartphone is connected to a charger, then the phone would simply disconnect power from the battery charging circuit once the battery is full, and ...
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0answers
30 views

Thinkpad T410S Suspend Problem

I recently bought an old Thinkpad T410S and everything was fine until recently occured a problem with suspend. When I press Fn+F4 (suspend button), laptop turns off screen, but do not suspend and ...
0
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1answer
43 views

How to set hard drive spindown while plugged into AC power on Ubuntu Server 16.04

I have created a personal file server running Ubuntu server. My only problem is figuring out how to have its hard drive spin down after x minutes. I managed to read the 20hdparm file and it states it ...
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0answers
35 views

Install perf at 4.5.2 kernel

Does perf affect battery life? At 4.5.2 kernel stable in 16.04 LTS the TLP output states: /sys/devices/system/cpu/intel_pstate/min_perf_pct = 18 /sys/devices/system/cpu/intel_pstate/...
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0answers
146 views

how to setup cpupower at boot time in Ubuntu 16.04?

Ubuntu users! I have a Intel computer running basically as a HTPC machine for years 24/7 and at a certain point in time the Linux kernel started to use the intel_pstate driver for my i7 Ivy Bridge (I ...
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0answers
13 views

How to install power utility?

When I shut my laptop screen, and again when I open it, there's nothing on screen. Again I have to press the power button and start Ubuntu again. What should I do?
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1answer
207 views

How to change Power-Button to Suspend in 16.04?

I know the answer here about How do I modify the options for the power button? However, the dconf-editor is completely different than in previous versions. There is no Settings-daemon. It looks like ...
2
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2answers
358 views

Poorer battery life after kernel upgrade: 4.5.2 (16.04 LTS)

When I first installed 16.04 LTS, at kernel 4.4.0, I had a decent battery life of about 3 hours average, but I upgraded to 4.5.2 to solve the suspend problem and some other issues, and now it's less ...
2
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0answers
36 views

How to prevent sleep/keep screen on when on USB power for Ubuntu Touch devices?

On Android devices, there is an option Settings > Developer Options > Stay awake when charging which keeps the device ON (prevents sleep) even if the device is not touched, when the device is ...
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0answers
32 views

Ubuntu 14.04 - Battery charging issues

My problem is that the battery won't charge. In the last few days I've noticed that my PC recognizes that I've put my AC adapter and starts the charging animation in the upper right corner off the ...
2
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0answers
41 views

Session closed instead of shutdown

Shutdown from taskbar, but instead session is closed. Why? I have to "poweroff" in terminal. Desktop computer running Ubuntu 16.04, recently upgraded from 15.10 (not sure, but I believe also ...
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2answers
47 views

How to shutdown system if not charging

I am using Ubuntu 14.04 LTS. My battery is not working, i.e. it provides backup for around 5 minutes. Now when I download stuff, it sometimes takes around 5 - 6 hours. And I can't just hang around the ...
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0answers
27 views

putting a battery status icon into my stalone

I'm running Trusty-tahr using fvwm, so I don't automatically get access to the battery status icon that's available in the standard ubuntu desktop manager. I'd like to put the standard icon into my ...
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0answers
207 views

Ubuntu 16.04 battery percentage shutdown not working

I installed Ubuntu 16.04 on my Dell Inspiron and got an issue that my laptop is not shutdown even after battery is critical low and even after percentage action. My dconf setting are as follow: ...
0
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1answer
55 views

Does pm-powersave start automatically when running on battery?

So I just learned a bit more about pm-powersave, but couldn't find if it automatically kicks in if you're running battery power. Does somebody know if it does this? And if not, is there a way to make ...
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0answers
130 views

PowerTOP issue with fresh 16.04 install on ThinkPad E555

Here's what happened when I tried to set optimum settings after installing PowerTOP: Reading package lists ... Done Dependency tree. Status information can be read .... Done Suggested packages:   ...
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1answer
308 views

Upgraded Ubuntu 16.04 sometimes fails to sleep

I upgraded my system from 15.10 (Ubuntu + xfce = XUbuntu) to 16.04 and afterwards it happens 50% that when I send system to Sleep through "start menu > turn off > sleep" that screens go blank and ...
1
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1answer
151 views

16.04 wont suspend when lid is closed

I have a HP Pavilion x360 I was able to get suspend and hibernation to work however it only works my the menu. When I close my lid it it just turns off the display. It seems that any option I select ...
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2answers
247 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 ...
2
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0answers
175 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) ...
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0answers
300 views

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

UPDATE: I have elaborated more on the problem in another post. Read it here. EDIT: Upgrading to 4.5.2 stable does the same thing. Is it the AMDGPU using more resources? How can I disable, I care more ...
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0answers
55 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. ...
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4answers
4k 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 ...
3
votes
1answer
79 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
1answer
60 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 ...
3
votes
1answer
2k 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 ...
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0answers
14 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 ...
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2answers
76 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 ...
4
votes
1answer
3k views

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

I have Kubuntu 16.04 64-bit installed on my HP Pavilion 17-f000 Notebook. I've tried the steps from the ubuntu 16.04 wiki, but the sudo pm-hibernate terminal command did nothing and creating the /etc/...
0
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1answer
28 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 ...
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0answers
21 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 ...
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2answers
1k 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 ...
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2answers
111 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
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1answer
14 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 ...
1
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0answers
97 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
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0answers
57 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 ...
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0answers
30 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
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0answers
43 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 ...
1
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1answer
81 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 ...
0
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0answers
25 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
44 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 ...
1
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0answers
65 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
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1answer
66 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 ...
0
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2answers
175 views

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

Update since the latest release of displaylink drivers this issue was solved - it was a driver issue I'm connecting a Lenovo Thinkvision Displaylink USB external monitor to a Lenovo Thinkpad T450s....
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0answers
46 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 ...
0
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1answer
78 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 ...
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0answers
34 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 ...
0
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0answers
33 views

Radeon driver power levels on RV670

I have just installed Ubuntu 15.10 on an AMD64 box with a Radeon HD 3850 graphics card (RV670, AGP version) and I'm using the radeon driver that comes with Ubuntu. So far, everything is working fine. ...