Questions tagged [power-management]

Questions related to power management, particularly power saving measures.

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16 views

Kubuntu battery drain even with TLP

I was exited to try kubuntu in dual boot with windows 10. But it makes my battery life less than windows 10, even with tlp installed and windows charge capped at 60%, low brightness and prime-selec ...
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11 views

Battery rate information unavailable

I have a notebook model: hp 15-da0021, and have the problem that the battery does not charge I asked him acpi the battery percentage gaby@tardis:~$ acpi -V Battery 0: Unknown, 0%, rate information ...
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Printing the highest power of 2, less than or equal to a given number [closed]

[ (($num -a ($num-1)) == 0) ] /code/source.sh: line 4: syntax error near unexpected token `(' /code/source.sh: line 4: `if [ (($num -a ($num-1)) == 0) ]'
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29 views

Ubuntu 20.04 Desktop - Only suspend after 10 minutes on battery

I have an Ubunutu 20.04 Desktop. It suspends after certain time without activity, no matter if it is powered. I want it to never suspend when powered, and suspend only after 10 minutes running on ...
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asus UX330UAR never can come out of suspend/hibernate

Install ubuntu 20.04 dual boot with win 10 on Asus UX330UAR laptop with onboard intel graphic card, besides fingerprint not supported, the biggest issue is machine usually can NOT come out of suspend/...
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25 views

WoL while laptop lid is closed

Hope you can help me with this problem. Namely, I have an old Asus laptop that I use as my home server. It's runnung Ubuntu Server LTS 20.04. I'm able to suspend it and wake it up by using $systemctl ...
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14 views

I want to control the setting of battery for msi laptop

I want to charge my battery up to 80 then stop thanks in advanced
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1answer
36 views

Laptop not suspending after closing my lid

I am using Asus Vivobook 15 X510U with Intel i7 - 8550U, 8 GB RAM, Nvidia MX 150. After a recent update, my laptop is failing to suspend when the lid closes. When I open the lid again, it shows only ...
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My laptop freeze or has black screen when I open the lid after suspend

Since when I bought this laptop (Huawei Matebook D14, it has a AMD Ryzen 5 3500U CPU with a Radeon Vega 8 GPU) and installed Linux on it (it's dualbooting with Windows), I have this problem that ...
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187 views

Is there a known way to get the battery to stop charging at 60% with Ubuntu on a Lenovo g50-30?

I recently setup dual boot to Ubuntu on my Lenovo g50-30. One of the reasons for doing this was because I was getting annoyed that 'conversation mode' (using Lenovo Energy Manager) was being reset ...
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GNOME power preferences application

Ok, I am asking this because I couldn't find anything on internet or S.E, or the newest post I found is from 2011.. I recently install Ubuntu 20.04 on my laptop (Lenovo ThinkPad), and I noticed that ...
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Battery and Screen Issues after switching from Windows 10 to Ubuntu (Lenovo Ideapad)

I recently switched from Windows 10 to Ubuntu 20.04.2 LTS on my Lenovo Ideapad L340. I have discovered some problems though: On Windows there was this utility called Lenovo Vantage which could change ...
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Finding Crash/Freeze Reason for Ubuntu 20.04 After Monitor Turns Off

A Ubuntu 20.04 system has its monitors automatically turned off after 30 minutes. However, there is this one time where pressing some keyboard keys no longer turn the monitor back on to show the login ...
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Laptop Not Charging

I have a samsung notebook 3 2015 model with intel core i3 2357m my laptop from today is not charging like it shows i have pluged in and it shows it is charging but my battery bar isn't rising from 18% ...
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battery power drain xps 13

New Dell XPS 9310 with UBUNTU 20.04 preinstalled. BIOS updated to 2.2.0. On "sleep" lose about 5-10 % of battery overnight. On "off" (either by "shut down" cmd or 15 sec ...
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Ubuntu 20.04.2 LTS machine heating

I am Using Ubuntu 20.04.2 LTS Machine with dual booting I have dual-booted both windows 10 & ubuntu 20.04 in the SSD (250GB). I have noticed that while using ubuntu fan speed is very high & ...
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Ubuntu 20.04 doesn't wake up from suspend anymore

My laptop has recently started to not wake up from suspend. The screen remains blank with only a white dash blinking in the corner. I always have to resort to pressing the power button to turn it off. ...
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27 views

Can I configure Ubuntu Server to use a laptop battery as UPS?

Before I purchase a laptop for testing, I'm trying to figure out if Ubuntu Server can support or if there is a package to support using a laptop as a server with the laptop battery functioning as I'm ...
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25 views

I power off the machine and afterwords it reboots

I have installed ubuntu 20.04 and when I shut down my ubuntu it powers on without pressing the power-on button. Can anyone have a solution to why it happens?
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171 views

TLP package with Power Mode Settings in Ubuntu 21.04?

Should I uninstall the TLP package now that Ubuntu 21.04 includes Power Mode settings by default? In other words, will TLP interfere with the Power Mode settings; are they redundant? According to the ...
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How to turn off laptop screen when lid is closed and connected to external monitor

So sometimes when I connect my laptop to a monitor I like to use both screens at the same time but sometimes I just want to use the monitor. However when I close my laptop screen, my cursor can still ...
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33 views

Automatically restore battery charging thresholds after replacing battery

When a laptop (Lenovo Thinkpad in my case) is used mostly plugged to the AC charger, two actions are recommended to extend battery lifespan: Most effective: Simply remove the battery, and use a "...
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29 views

How to start service after resume from hibernate in Ubuntu 20.04?

Running Ubuntu 20.04. In order to conserve battery life, I have a service that runs at boot that will cap the charge level to 80%, see service below (/etc/systemd/system/battery-charge-threshold....
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Ubuntu Power down

I am running Ubuntu Server 20.04 LTS and I am having problems shutting down the computer. I trigger a shutdown, the computer says: "reboot: Power down" and pc does not power off. What ...
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Battery drained out while i was working in Ubuntu and now i am unable to access to it [duplicate]

I use hp laptop with preinstalled windows 10 when I brought it, I dual installed ubuntu 20.04 in it after a couple of months while i was working in ubuntu the battery drained out and became 0 and it ...
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37 views

Ubuntu studio 20.04 xfce, power management not working properly. I can't set my display to go off after a set amount of time

I am running Ubuntu studio 20.04 Xfce on an Acer Aspire 5755G with 16G RAM and a NVIDIA GeForce GT540M. Everything works fine and the system is pretty stable, but for some reason power management ...
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29 views

Computer sometimes sleeps/suspend on wakup [closed]

My computer is set to suspend after 20 minutes, when I wake it up, it will sometimes go back to sleep again after a few seconds. I can then wake it a second time and everything is fine. I looked at ...
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1answer
79 views

My ubuntu does not go to blank screen

In my power settings I have setup automatic Blank Screen in a minute however it does not go to blank. This is a laptop Lenovo Thinkpad. How to fix this? Is there at least any way I can manually ...
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38 views

Ubuntu 20.04.2 LTS with Legion 5i Screen Brightness

I've had the issue since I bought this laptop. Initially tried 6 months ago with installing Linux Mint. Had so many issues I decided to go with Windows. I'm now on Ubuntu. It's great, but the only ...
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45 views

Suspend and Hibernate Problems with a new HP Envy Notebook

I'm new here, please be patient with me. I'm using Ubuntu since years on my own Notebook and it works great, most of the time. Now I bought a new notebook for my son and installed Ubuntu 20.10. Most ...
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47 views

Capturing sleep/hibernate/wakeup events on Linux desktop and laptop environments

Explored 2 options to capture these power events, but unfortunately none of them worked as expected. DBus works on Desktop but these events also need to be captured on Laptops and Linux environments ...
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How to make a screen dim smoother/slower after a period of inactivity

I am running my laptop on Kubuntu 20.04 LTS. Of course, the system has the possibility to gradually dim the screen after a period of inactivity. However, this happens in abrupt steps, which, ...
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42 views

Reducing battery usage when multiple users are logged in

I often have multiple users logged into separate graphical sessions on a laptop. My problem is that processes, particularly firefox, owned by other user accounts than the currently visible one are ...
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1answer
80 views

How do I limit battery charging to 80% on Ubuntu?

I'm using a Dell XPS 13 7390 and am wondering if this is possible. I can do this in Windows but the Dell power management app doesn't seem to be available for Ubuntu.
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52 views

Laptop not waking from sleep

I'm running Ubuntu 20.10 on an Acer Swift 3 laptop (SF314-42) and when i sleep/suspend the laptop, the screen is blank, sometimes when i suspend it for 10 seconds then wake it, it works, but when i ...
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1answer
62 views

After latest software update 'Daemon for power management' fails to start

After installing and restarting my computer from the ubuntu software updater prompt, my computer never completes a boot due to "Failed to start Daemon for power management": /dev/sda2: ...
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1answer
43 views

How to make ubuntu server auto shutdown after few hours

I want to make my server auto ON and OFF. I turn ON server by BIOS option everyday at 8:00am. How can I make, that system will shutdown auto everyday at 11:59pm?
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19 views

How can I control HDD spin manually in Ubuntu 20.04

I use a HDD in my PC via USB port as a data disk and I don't use it very often. I konw ubuntu will automaticlly spin down after inactive for a period but I'd like to know if I can power on or power ...
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1answer
20 views

Turning on HDTV/Monitor on boot or unsuspend

I use a 4K HDTV as my monitor, which I highly recommend. The one issue is that unlike most monitors, it does not power on when it detects a signal appearing on the HDMI. So if I forget to power on ...
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99 views

How do I get Ubuntu 20.10 to hibernate on lid close?

On Ubuntu 20.10, I can hibernate my laptop from the terminal with sudo systemctl hibernate, as well as with the Power Button Behavior set to Hibernate under Settings: Power: Suspend & Power Button....
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2answers
77 views

How to disable auto suspend temporary (reset idle time)

In Ubuntu 20.04.2 LTS(default GNOME desktop). I enable auto suspend on Ubuntu GNOME desktop, but, If only running my program, I want to disable auto suspend. My program running in a second, and loop ...
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13 views

How to diagnose laptop freezing when on low power?

Dell Latitude E7470 with Ubuntu 20.04 - whenever power gets low enough, the whole laptop will freeze. If audio was playing, it'll be looping on repeat. Nothing will work to reset it - not even REISUB. ...
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48 views

Power management issues! [duplicate]

I'm using an HP-15BS542TU laptop. I have been using it for the past 4 years with Windows 10. I recently installed Ubuntu about 2 months ago. While on windows, my laptop lasted 10 hours on a full ...
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34 views

Disable Power Prompt When Shutting Down Ubuntu 16.04

I am running Ubuntu Desktop 16.04.7 LTS inside a KVM/QEMU VM. I manage this (and other VMs) via the virsh CLI, including starting and shutting down the VM. No matter what I do, when I issue the ...
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45 views

HPE Enable High-Efficiency Mode

I've been reading through the HPE Common Slot Power Supply Documentation and noticed "high-efficiency mode". It states you can enable it "via the server's ROM-based setup utility under ...
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1answer
28 views

Will the custom battery settings set in Windows Power Manager hold when I dual boot with Ubuntu and use Ubuntu instead of Windows?

So, I used Windows Power Manager to limit my batter threshold to 60%. Will that hold when I am using Ubuntu in a dual boot system or will the battery charge to 100%. Currently my battery percentage is ...
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51 views

Bizarre Manifestation of Inabilty to Wake from DPMS (Ubuntu 20.04 LTS and amdgpu)

I've encountered a very strange problem with monitor sleep/wake (not system suspend), which is similar to what I've seen discussed elsewhere, but mine seems a little unique. I am running Ubuntu 20.04 ...
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16 views

How to set up Ubuntu Mate for suspension after inactivity?

I'm using Ubuntu Mate 20.04. In the settings, there is the option of putting the computer to sleep after inactivity, but not to suspend it (and putting it to sleep uses considerably more battery). Is ...
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1answer
99 views

Does Marco's compositor affect battery life and/or performance?

I am new to Ubuntu/Linux, so please bear with me. I am using Ubuntu MATE on a laptop, and I'd like to optimize battery life as much as I can. I noticed that the Marco window manager can be set to have ...
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1answer
94 views

Turn off monitor

I just upgraded to 20.04 from 18 for my Ubuntu server which runs on a laptop. I have an alias that runs at startup that uses vbetool to turn off the screen sudo sh -c 'vbetool dpms off; read ans; ...

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