Questions related to power management, particularly power saving measures.

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1answer
24 views

echo 1 > /sys/bus/pci/slots/$4/power bash: /sys/bus/pci/slots//power: Permission denied

On typing echo 1 > /sys/bus/pci/slots/$4/power, I get this error: bash: /sys/bus/pci/slots//power: Permission denied Here is the output of lscpi -vvon my system: 02:00.0 Multimedia controller: ...
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0answers
91 views

Ubuntu 16.04 won't shutdown

On my MSI GS60, when I try to power off Ubuntu 16.04 LTS the laptop will not shut down. Reboot works fine though. I have removed the quiet splash parameters for grub so I can see the output. When I ...
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0answers
23 views

Is there a way to disable sleep of a remote computer from command line?

It's an Ubuntu 12.0.4 computer that I have access only through ssh. How to prevent it from going to sleep?
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1answer
42 views

Battery information is wrong

I have replaced the battery in my laptop with a lower capacity battery than what was previously inserted. Ubuntu hasn't calibrated the battery metering system, and so the statistics & percentages ...
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0answers
13 views

Bluetooth loses connection with mouse in 14.04

recently i bought Thinkpad bluetooth mouse (OA36414) however, the mouse lose connection from my laptop (ubuntu 14.04) from time to time which troubles me a lot. I have read this enter link ...
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0answers
35 views

Power management, caffeine and crash problems-Kubuntu 16.04

I have installed kubuntu 16.04 about 2 weeks ago and I ran into tons of problems since then. I have suceeded in resolving couple of them but the ones listed in here are too much for me to handle. I am ...
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1answer
47 views

Ubuntu drains battery very fast on 16.04

I have Dell XPS L502X I have installed SSD of kingstone 120 gb After that i have i have installed ubutu 16.04 and my battery drain very fast at 100% charging work 1 hour and 13 minutes while in ...
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0answers
23 views

Mint + Kernel 4.5.4: laptop loses suspend state when unplugged [closed]

I'm using Linux Mint 17.3 on a newish Asus laptop with Mate desktop. To get the Nvidia graphics and Elan touchpad both to work, I installed the 4.5.4 Linux kernel. I've pretty much got everything ...
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0answers
17 views

How to disable Bluetooth devices from turning off due to inactivity in 14.04

I am fairly new to Ubuntu. I know in Windows OS you can disable Bluetooth power management, which disables the devices from turning off/going to sleep. I would like to disable that for Ubuntu 14.04 ...
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0answers
24 views

Kali Linux is not shutting down after installing dual boot on HP Pavilion g6-2320tx [closed]

After shutting down Kali Linux I encounter a problem it kills all running processes and screen goes black,my computer doesn't power off. The fans still run and the screen is still on, etc. I have to ...
0
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1answer
102 views

Kernel build 4.4.0.22 decreases battery life (16.04 LTS)

My battery life was fine when I installed 16.04 LTS (clean install) on my Lenovo z51-70, but after a regular software update or build to kernel, from 4.4.0.21 to 4.4.0.22, it has almost halved (1.50 ...
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1answer
56 views

How to configure power managment with tlp?

I have a similar issue like this user, that is my hard drive overheats. I'm running Ubuntu MATE 15.10, which has tlp, and I've read that they should not be installed together. So is there a way to ...
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0answers
18 views

Power Failure on Software RAID 10: is automatic resync enough?

I had a power failure on a server (Ubuntu 12.04.3 LTS ) with a raid 10 array. When I restored the power, in dmesg there was the message: md/raid1:md1: not clean -- starting background reconstruction ...
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0answers
14 views

Authenticate to suspend?

Fresh install of LUbuntu 16.04 on a Compaq CQ58 (El cheapo AMD C60 laptop from Wal*Mart, bought on Black Friday 2012.) I walk away from it and it's supposed to suspend. I come back to an ...
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2answers
273 views

Laptop won't suspend on 16.04 (Kernel 4.4.8)

So I had Kubuntu 16.04 which had been upgraded from 15.10. Always worked fine and slept when I closed the lid. I installed Ubuntu (switched from Kubuntu) (clean install, formatted root partition) ...
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0answers
11 views

Restrict waking up from suspend to specific buttons only

I have an Acer Aspire notebook with 16.04 installed on it. Currently when I suspend, it wakes up on basically everything, including: opening the lid pressing the Power button pressing any keyboard ...
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0answers
50 views

HP Probook 450 G3 doesn't work suspending when lid was closed on ubuntu 16.04

Have a small problem - my laptop cannot suspended when lid was closed. It's doesn't work only on ubuntu 16.04, on previous versions all works good. The power settings configured correctly (set sleep ...
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0answers
55 views

Ubuntu 16.04 Won't Power Off

I own Asus E402S Laptop, and it's not shutting down. It only stays at the "Ubuntu" logo. I've tried this link for solution. 00:00.0 Host bridge: Intel Corporation Braswell SoC Transaction Router ...
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3answers
95 views

In Ubuntu 16.04, which ACPI Global State does Suspend result in?

I have read the post on "What is suspend". However, I would like to know exactly which ACPI Global State does pressing the Suspend button lead to. Can someone explain this? Specifically, how do I ...
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0answers
86 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 ...
0
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1answer
28 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
37 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
24 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
34 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
29 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 ...
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0answers
87 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
100 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 ...
1
vote
1answer
270 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
29 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
26 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 ...
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0answers
26 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 ...
1
vote
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
25 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
150 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
votes
1answer
47 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
88 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:   ...
0
votes
1answer
227 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
vote
1answer
118 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 ...
0
votes
2answers
185 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
votes
0answers
154 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
269 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 ...
0
votes
0answers
50 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. ...
4
votes
4answers
2k 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
72 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
45 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
913 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 ...
2
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2answers
67 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
1k 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 ...