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Questions tagged [power-management]

Questions related to power management, particularly power saving measures.

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Set maximum frequency for one core

I want to set the frequency of one of the cores to the maximum value, a.k.a High Performance in Ubuntu 18.04. However, the paths described in this topic are not found. # ls /sys/devices/system/cpu/...
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1answer
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i3 3850k stuck at max freqeuency (100% C0)

For the past few days my PC has been stuck at max frequency. My Specs Ubuntu 18.04 Server (headless) i3-8350k ROG Strix z370 Gaming Mobo with Wifi 32GB RAM I've tried using tlp to enable powersave ...
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1answer
26 views

16.04 kernel Update breaks power saving - how to fix?

I used to have 7-9 hours of battery life on my system running 16.04LTS. But, recently, I noticed battery life halving to around 4.5 hours. It seems this has been going on since around May '18. ...
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Logs flashing before login screen on wake from suspend

When waking from suspend, just before the login screen, a couple logs flash, all saying usb_reset_and_verify_device Failed to disable LTM. I've looked up the issue and some people mention it being ...
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Gnome overview laggy when running scaling_governor=powersave

I have a Dell XPS 13 9370 with an i7-8550u CPU which should handle Gnome without any issues. The Ubuntu version is 18.04. But now experience the following problem: When setting the scaling governor to ...
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Laptop Screen Black After Suspend Ubuntu 14.04.05 LTS

I´m a new user to Linux and I am running into an issue with suspend on my laptop. Model: Hp 240 g5 OS: Ubuntu 14.04.05 LTS When I close the lid of my laptop (suspend), it will be shutdown like ...
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19 views

How to show battery status in figures in 18.04?

I have just upgraded from 16.04 to 18.04.1 LTS.In 16.04 I could see the battery icon on the screen with time till flat and percentage charge showing as hours/minutes and a percentage in the top bar. ...
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Ubuntu 18.04 Battery Icon not showing - HP Spectre x360

I have a dual booting system with Windows 10 Home and Ubuntu 18.04 LTS on an HP Spectre x360. When on Ubuntu, the battery icon does not show up. When trying to troubleshoot, I used the command ...
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14 views

No Power to USB without a Device Plugged in on Boot

I recently installed Ubuntu 18.04: 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:39:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux On a Razer Blade Pro and the following issue has come up. My USB port ...
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1answer
39 views

Laptop wakes up by itself a few seconds after suspend or lidclose

I am running an Ubuntu 18.04.1 with kernel 4.15.0-29-generic, and my laptop (Macbookpro retina 15inch, mid 2015, MacBookPro11,5) wakes up automatically a few seconds after sleep. When I look at the ...
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How can I detect if the display was powered down by dpms?

Assuming I power down my laptop display with: vbetool dpms off # or xset dpms force off how can I detect that the display is now off? I would like to switch between on and off with a single button ...
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Ubuntu 18.04 on Thinkpad P50 - high battery usage

I have new a Thinkpad P50 machine with 32GB of memory. The battery life in the same system with Ubuntu 14.04 and 16.04 life seems reasonable. The problem started with the upgrade to Ubuntu 18.04. I ...
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18.04 battery charge indicator doesn't reflect state of charge

I recently upgraded to 18.04 from 17.10. The system tray icon (I happen to prefer xfce4 instead of whatever the default GUI user interface is) no longer seems to display the relative state of charge. ...
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1answer
112 views

How to disable auto sleep in Ubuntu 18.04

I recently installed Ubunutu 18.04 in a rather old laptop I have, and am having some major issues with the device going to sleep and then getting stuck in a loop where it goes to sleep every five ...
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32 views

Ubuntu 18.04 laptop fan working non stop draining battery [duplicate]

I have a Lenovo-ideapad-500S-14ISK laptop(intel skylake i5-6200u CPU). recently upgraded to Ubuntu 18.04 from then i'm noticing the laptop fan is always on even-though there is no load. on the last OS ...
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44 views

Laptop does not wake up after closing lid Ubuntu 18.04

I just purchased Lenovo X1 Carbon 6th Gen, and Ubuntu 18.04 doesn't seem to be so compatible with its hardware. I frequently run into the issue of my laptop draining its battery while its lid is ...
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2answers
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What command will wake up a sleeping USB drive?

I have an power-managed USB drive that powers down when not in use, and wakes up automatically when accessed. It's used as a backup drive from a root script which mounts it when necessary. Sometimes ...
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Ubuntu 18 & Thinkpad P51 - Slow Performance without Power Supply

I'm running Ubuntu 18 - kernel version 4.15.0-29-generic - on a Thinkpad P51 (with Intel Xeon Core). Whenever my Laptop is plugged in the performance is awesome. However without power supply I face ...
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1answer
90 views

Blank screen after resume from suspend on 18.04 on HP Elitebook 850 G5 (Intel HD graphics)

Blank screen after resume from suspend on HP Elitebook 850 G5 Intel HD graphics (no dedicated GPU) Ubuntu 18.04 After powering on the laptop to resume, the screen remains blank although the power, ...
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81 views

Battery and hibernation problem on lenovo laptop

I'm totally new to this world of yours, so I hope you'll be merciful enough and you're not about to scream. First of all - I've done something really stupid. My operation system was licensed windows ...
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1answer
69 views

Keep a laptop running with closed lid

I am trying to keep my laptop running with the lid closed. What I've done so far is: In the file /etc/systemd/logind.conf add HandleLidSwitch=ignore both for docked and plain mode. This didn't do ...
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After installing ubuntu 18.04 LTS my battery drains

I am having a problem with my Dell laptop, in that after installing Ubuntu 18.04LTS (from windows 8), my battery drains very fast, without doing anything heavy. When I had Windows I could use my ...
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41 views

Instant wake from suspend even with all proc/acpi/wakeup disabled

I am trying to debug what I suspect to be a hardware issue. In short my ThinkPad T450 instantly reboots on shutdown and wakes up on suspend. I'm running Ubuntu 16.04, I have disabled everything in ...
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1answer
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Samsung Notebook 9 Pro (NP940X5N-X01US) failed to resume from suspend under Ubuntu 18.04 LTS

Graphic Card: Radeon RX 540 2G Steps to reprodece: Close the lid and wait for the laptop to suspend Reopen the lid Expected behaviour: The laptop resumes working Current behaviour: The laptop does ...
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38 views

How to suspend after a certain period of time on lock screen and on AC? (Ubuntu 16.04)

I want to suspend automatically only if on lock screen and after a certain period of time (on AC). Is it possible? Scenario: plugged to AC dockered external monitor PS: when on battery it does ...
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37 views

“No batteries available” Kubuntu 18.04 - Acer Aspire E 15 (E5-573T)

I just made a fresh install of Kubuntu 18.04 (64 bits) on my Acer Aspire E 15 (E5-573T-POVK), but the battery isn't detected. The indicator shows "No batteries available", and upower --dump gives ...
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1answer
65 views

ubuntu 18 freeze when systemctl restart systemd-logind.service

I am trying to change lid close behavior using this When I get to the systemctl restart, system freezes and gets stuck. What am I doing wrong here? Is there a simpler solution?
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1answer
63 views

How can I change the power related settings (suspend, hibernate…) with the command line only?

I am using Ubuntu 18.04 with i3wm, so I don't have access to the settings menu from Gnome. I am using a laptop in a dock with two external monitors hooked up to it. The lid is closed while it's in ...
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1answer
88 views

How to monitor power consumption on Ubuntu Server 16.04

Is there a way to monitor power consumption in watts? I have tried PowerTOP but it measures the usage in percentages, which is not what I want.
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109 views

Suspend on Ubuntu Server 18.04

I'm a total newbie with Linux and I'd like to create an home NAS. I just installed Ubuntu Server 18.04 on a USB stick, moved tmp folders to RAM, installed LAMP, Webadmin and enabled the Firewall. ...
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1answer
86 views

How can I stop charging my battery at 60%?

I have Asus Zenbook UX430UN and in windows it have some kind of battery health management program. And this program propose option called "Maximum Life-span" the idea is to hold battery on +- 60% of ...
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Cannot permanently turn off my screen via command in Mate without locking my desktop

Sadly, I have some very annoying issue with my display. I have looked for and tested various solutions but none of them worked properly. When I run the command sh -c "sleep 1.0; xset dpms force off" ...
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61 views

Ubuntu 18.04 mouse issues after suspend

I am using Ubuntu 18.04 running on lenovo carbon yoga x1 (1st Gen). Everything work fine most of the time, but after I put the computer to suspend and then wake it up in the am, the mouse goes a ...
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1answer
108 views

CPU temperature goes high when playing video in a browser - what can I do?

My laptop is overheating almost 90 degrees. This doesn't seem normal with only a browser running. I used an answer by Bernard Wei to find out what was triggering my overheating problem Try running ...
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133 views

Airplane mode automatically switches “ON” when the lid is closed in UBUNTU 18.04 on hp laptop

Whenever i close the lid of my laptop screen the airplane mode switches on and when i again re-close it , the airplane mode switches off. Is there a way to stop this from happening? The downloading ...
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76 views

USB-C charging issues - ASUS Q325UA

Linux 4.15.0-23-generic x86_64 Ubuntu 18.04 LTS Charging works... but certain conditions leads to difficulty getting it registered as plugged in to charge. I think I narrowed it down to one ...
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1answer
49 views

Excessive power consumption in suspend mode

When I put my laptop into suspend mode it consumes around half of the battery in around 8 hours. This is pretty higher when comparing the previous versions of Xubuntu that I've used. Any idea how to ...
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HP Pavilion 15-bc050nw - power led strange problem - Ubuntu 18.04 x64

Recently I've got a strange problem with power (charging) led. I've got Windows 10 installed and I want to try Ubuntu 18.04 live from a USB stick. When in Windows battery is charging I have an orange ...
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62 views

How to stop Chrome from making suspend inhibits?

Ubuntu 18.04 Version 67.0.3396.99 (Official Build) (64-bit) By monitoring systemd-inhibit --list I have come to the surprising conclusion that a newspaper website I visit in Chrome is placing an ...
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1answer
272 views

Ubuntu 18.04 Laptop Lid Behaviour

I've been having this problem with my acer laptop where ubuntu totally ignores the lid power options. I want my laptop to lock (always) when I close the lid and also, to sleep (only when the adapter ...
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1answer
38 views

Powertop shows ~30W, and fans working somewhat hard, during light internet browsing

I have an MSI GS65, on which I installed 18.04 alongside Windows 10. Things are generally going well, but I notice my fans are often going at a moderate clip, and the battery life is not so great. ...
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54 views

How to shut down my ubuntu 18.04 using the power on button?

I'm configuring this new ubuntu version to work as a Plex Server in my house and I've configured in energy options how the power on button should work. It works fine when I have a monitor connected (...
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26 views

Battery not charging but detected

my Lenovo N581 detects the battery, but it doesn't charge it (as soon as I unplug the AC, it turns off). When i type upower -i /org/freedesktop/UPower/devices/battery_BAT0 into the terminal I get: ...
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1answer
121 views

TLP will not let my battery charge

I am running Ubuntu 17.10 on Lenovo Thinkpad w540. I have installed TLP and played with the battery charge thresholds. I have installed the acpi-call-dkms package to support the charging thresholds. ...
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1answer
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How can I loop sleep/hibernate/reboot/cold boot for testing in Ubuntu?

I would like to test the system stability on power management, like reboot system for 500 times and see if it unresponsive or failed to reboot. It's easy to do this in Windows using pwrtest, but I ...
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Battery showing charging when not plugged in on 2011 Macbook air Ubuntu 18.04

So I just installed Ubuntu 18.04 on my 2011 Macbook Air and it's saying it's charging when I'm running off battery and vise versa. I don't know if this is a driver issue or what. EDIT: Sometimes it ...
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27 views

Audio pops: Disable power save for snd_usb_audio?

TL;DR: How do I disable power save features for snd_usb_audio alsa-driver? I have a Focusrite Scarlett 18i20 external soundcard. During boot as well as whenever no sounds have been played for a short ...
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135 views

18.04: kubuntu: KDE: Power consumption is extremely high: Slowdown?

On kubuntu 18.04, Power consumption is extremely high, anyway to slowdown? I already disabled all effects and stopped compositor from auto-starting. My 3-cell battery lasts 4-hour browsing with ...
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104 views

Ubuntu 18.04 Won't Resume

I performed updates yesterday. Now my Ubuntu 18.04 won't resume after power save turns off the screen from inactivity. The back lite light on both my laptop computer & external monitor turns ...
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1answer
244 views

Does linux have a hybrid “deep sleep” mode like the Mac?

On Mac OS a laptop will suspend to RAM when you shut the lid, when its been asleep for a certain (configurable) amount of time it will hibernate. This is generally good, since you get the fast sleep/...