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Questions tagged [power-management]

Questions related to power management, particularly power saving measures.

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Ubuntu 22.04 - Notebook doesnt boot up when running on battery

I have this problem for a long while after the installation of Ubuntu 22.04 in my notebook. If I’m working on it, plugged to electricity, and unplug it to emulate an outage, I can keep working ...
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Monitor on Thunderbolt 4 does not restore connection after resume from standby Ubuntu 21.10, TU117GLM [Quadro T500 Mobile]

I have the same problem. Experienced it first on 20.04, and now on 21.10. Appreciate if anyone has suggestions. Problem: Any monitor attached to Thunderbolt 4 of Thinkpad P15s Laptop Computer does ...
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1 vote
2 answers
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Laptop Lenovo T15p Gen 2 with Ubuntu 22.04 LTS consumes battery very fast

I just got a new laptop Lenovo T15p Gen 2 and remove the Windows 10 and installed Ubuntu 22.04 LTS. The problem is that the battery gets drained very fast. I installed the last bios version and check ...
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Ubuntu 20.04 reads incorrect battery level to critical which causes laptop to shutdown

I have a Lenovo Thinkpad P2 running Ubuntu 20.04. I am getting critically low battery level even though I have more than 80% charge at times. Due to this, my laptop shuts down within a minute or two ...
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Ubuntu 20.04.4 LTS - Wake on LAN not working - PC Powering on but not booting into OS

I have a raspberry pi that I'm using to power on my old HP PC (HP Compaq 8200 Elite SFF) I have enabled Wake on LAN the ethernet interface of my PC by following instructions in https://linuxtut.com/en/...
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Ubuntu Intel CPU often dropping to 400-600Mhz

I run Ubuntu 22.04 on my Lenovo Thinkpad T15 Gen 2 and for some reason, my Intel CPU frequency often drops to the range of 400-600Mhz I'm not sure why is this happening? What makes it even weirder, is ...
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1 answer
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Main menu does not show "Reboot" or "Hibernate", only "Suspend" and "Power off"

Since shortly ago, the main menu does not show "Reboot" or "Hibernate", only "Suspend" and "Power off". I do not recall anything happening that might have led ...
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Schutdown & poweron schedules [duplicate]

I got an Optiplex server for my homelab needs which runs on Ubuntu 22.04 LTS , but I don't need it running 24/7. Say I only want it running from Mo-Thur 14:00 - 23:00, Fri-Sa-Su 04:00 - 23:00 (or for ...
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1 answer
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Random suspensions of Ubuntu 22

I recently completed a new build with ryzen 5900x, ASUS ROG strix B550-F and RTX 3060. I'm going to use this machine as workstation as a ML software engeneer. I installed ubuntu 22.04 LTS and ...
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Serious battery life impact since upgrading to 22.04

Since upgrading from 21.10 to 22.04, the battery life on my XPS 9300 has dropped by 30-40%. It also started draining during sleep. I've tried auto-cpufreq without TLP, and I've tried TLP without auto-...
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Resume after suspend not always asks for password

Ubuntu Mate 20.04 LTS is freshly installed on my Acer Swift 314-57 laptop. When I enter suspend mode by selecting this on the upper right menu, then my password is not requested upon resume. When I ...
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1 answer
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Need help to change power management settings

Ubuntu Mate 20.04 LTS is freshly installed on my Acer Swift 314-57 laptop. The laptop wakes up for no apparent reason, which I don't really want. There is no Intel Smart Connect setting in the Bios. ...
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How to stop apcupsd slaves from sending emails?

I have several machines running apcupsd which are network slaved to a master connected to the UPS. From time to time we get short (~5sec) power brown outs which the master sends out emails about. ...
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My laptop battery "Is not charging" after recent update of Ubuntu

About two weeks ago after some system update of Ubuntu 21.10 my battery stopped charging when the power cord is plugged on the working system. If I close it's cover and plug cord in - it begin ...
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Kubuntu 22.04 won't suspend when on fully charged battery and lid closed

I have a Thinkpad X1C Gen 5 which has been working reliably with various versions of Kubuntu so far. But a few days ago I upgraded to 22.04, and the sleep when on battery and lid closed behaviour ...
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Computer goes to sleep/hibernates

I have had this problem since I got the machine, initially it was Ubuntu v20.04 and now I have 22.04. The issue remains the same. After I lock the machine it goes to sleep or hibernates, I don't know ...
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AMD 5600H Power Management Options for 22.04

I have an HP Pavilion laptop with an AMD Ryzen 5 5600H processor and Nvidia graphics card. While I am able to set Nvidia into power saving mode, I do not have any option to do so for my processor. I ...
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Thinkpad X1 6th gen (ubuntu 20:04) battery status appears incorrectly as not charging,

attempted to log on to my machine this morning but it froze once I entered my password. I hard reset the machine and since then it appears as "not charging" but has stayed at 95% for over 3 ...
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System not started after power failure

I am running some python script in my old computer, the script basically sends data to telegram group every 15mins. The script / computer was working good till I had a power failure. The script is ...
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Ubuntu 20.04 WIFI and Bluetooth stop working when I close the lid of the laptop, even though an external monitor is turned on

I recently had to reinstall my Ubuntu 20.04 and after installation I found that when I close the laptop lid while using an external monitor, my Bluetooth keyboard and mouse start to react extremely ...
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How to configure sh handler for physical poweroff button?

How to make sh script and run it when physical poweroff button is pressed? How to remove standard handler with user confirmation for this button?
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1 answer
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How to poweroff / reboot / suspend / hibernate Ubuntu 22.04 by two mouse clicks (not four as by default)?

How to remove confirmation menu when performing poweroff / reboot / suspend / hibernate actions? How to place this menu items without submenus? In Ubuntu 20.04 I used "Simpler Off Menu" ...
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1 answer
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Where is working "Simpler Off Menu" gnome-shell extension for Ubuntu 22.04?

For Ubuntu 20.04 extension can be installed from here. But for 22.04 it is not working. Where can I found working version and how to install it?
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2 votes
1 answer
522 views

How does Ubuntu 22.04 handle power modes?

As you've probably noticed, power mode option has been added to new Ubuntu . I wonder how this feature works. I mean, what happens when you put a machine into whether power saving mode, max ...
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Ubuntu 22.04 only blanks, but does not turn off screen

Recently upgraded to Ubuntu 22.04, and it seems like the power-saving feature does not actually turn off the screen(s) after X minutes, but just blanks them. When I manually run xset dpms force off, ...
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1 answer
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Inspiron 15 3525 w/new Ubuntu install won't turn on after closing lid

A dear friend, disabled Vietnam vet, had to replace his old computer, and bought a Dell Inspiron 15 (3525) and asked me to put Ubuntu on it. After a somewhat fraught install process (BIOS in this ...
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1 answer
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How do I change power button functionality to Suspend in stead of Power Off on ubuntu 20.04?

Summary How do I change power button functionality to Suspend instead of Power Off on Ubuntu 20.04? Details Just updated Ubuntu to 20.04 from 18.04. Pressing the power button used to Suspend instead ...
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9 votes
7 answers
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How will Ubuntu handle battery replacement in a laptop?

The battery in my Dell Inspiron 17 laptop is terrible and I'd like to get a replacement. Of course I have Ubuntu (20.04) installed, and I'd like to know how it will handle the replacement. Will I be ...
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1 vote
0 answers
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Ubuntu 22.04 / Modify Power Saver Behavior (Do Not Dim Screen)

First of all, I think it's really cool that Ubuntu 22.04 (I upgraded from 20.04, the last LTS version) now has the ability to switch between different profiles. Depending on what I do, I have times ...
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1 vote
1 answer
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Unable to set Nvidia Graphics card to Power Save mode

my HP aptop comes with a Nvidia graphics card. I was kind of able to turn it off using Nvidia Xserver Settings as seen below in while using 21.10 Now that I have upgraded to 22.04, the Intel (Power ...
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-1 votes
1 answer
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Why is my laptop charger detected but not charging the laptop

I noticed just today that in the top right of my screen that my battery was not charging but i had my charger connected in the laptop itself, my laptop is a T460s Lenovo laptop and it has lights to ...
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1 answer
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20.04 is going to sleep - Sleep should already be disabled

I have a brand new 20.04LTS Laptop that keeps going to sleep. When it goes to sleep, it does not wake up without a forced reboot (holding the power button). I have disabled sleep and hibernate with ...
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1 vote
1 answer
777 views

Ubuntu 22.04 - Built-in power settings vs. TLP

I've just switched from ubuntu 20.04 to 22.04 and noticed the new version offers power management settings, to an extent. I suppose one shouldn't run tlp alongside it, but choose one or the other? And ...
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32 views

flickering screen on laptop when on battery

I have a flickering screen when I remove the power on my laptop. I never had this issue, just having this all of the sudden (on ubuntu 21.04 and upgrade to 21.10 didn't change). the issue disappears ...
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Full disk encryption - password prompt automatically shut down after 5 minutes

I'm using laptops and they do start up when the lid opens - it is nice and I like it. However sometimes the lid opens while the laptop is in the bag. It then boots to the password prompt. And when I ...
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0 votes
1 answer
54 views

Can't wake with external keyboard/mouse when the lid is closed

I have a laptop running Ubuntu 20.04 LTS which is connected to an extenal monitor, while the built-in display is off (and the lid is closed). I have an external wired keyboard and mouse and when I ...
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Bluetooth power keeps turning off when told not to

I found answers prior re my Ergo bluetooth trackball; the power settings (20.04LTS current) for bluetooth can be set to NOT turn off to save power (what I want). However, if I set that to NOT turn off ...
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1 vote
0 answers
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Chuwi Corebook X - Ubuntu 20.04 with kernel doesn't recognise battery. Is it fixable?

I bought Chuwi Corebook X i5-8th generation variant and after Ubuntu installation I can't check how my battery is doing, there is no battery percentage indicator. Did some digging and it seems that ...
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1 vote
0 answers
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Keyboard doesn't work after closing lid. Running Ubuntu 20.04.4

I am running Ubuntu 20.04.4 on a Sony VAIO VGN-CS320J. Bear in mind, I am a complete newbie, and know very little about this, so pardon my incompetence. The touchpad still works after re-opening the ...
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50 views

Ubuntu 20.04 LTS can not wake up from suspend

I have an ASUS UX461U which originally had Windows 10 installed. When it was still installed, I dropped it and it couldn't wake up from sleep anymore. I installed Ubuntu recently and the problem seems ...
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1 answer
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Could dual-booting have been the cause of my issues?

I installed Ubuntu 20.04 LTS "alongside" Windows 10 to make sure that Ubuntu would work well on my laptop (Acer Swift X) before fully committing to Ubuntu. I ended up getting scared and ...
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0 votes
1 answer
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modprobe intel_rapl_common: no such device on Intel Core 11th-i7 dual-boot system

I am using a Dual-boot laptop (Windows10 and Ubuntu18.04 LTS), and I am trying to using the Intel RAPL interface for power measurement in Ubuntu. When I want to use sudo modprobe intel_rapl_common to ...
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35 views

Turning off screen power when the screen saver kicks in

One of my laptops (a HP one) is rarely in active use but is always on, basically used remotely and for backup purposes. However, the screen is always powered on, even when the screen saver (black ...
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Ubuntu 20.04 hibernates instantly when power cord is unplugged

I'm running a Fujitsu Lifebook U Series with Ubuntu 20.04 and Windows 10 as dual boot. Every once in a while, when I detach the power cord, Ubuntu responds by going to hibernation immediately, meaning ...
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Lenovo Ideapad Creator 5 won't charge the battery after I install Ubuntu 20.04.4 LTS

Lenovo Ideapad Creator 5 won't charge the battery after I installed Ubuntu 20.04.4 LTS before that it has Windows 10 which I had to replace with Linux. Another issue is that it has is the charging ...
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0 votes
1 answer
40 views

Issues when suspending and waking up on desktop PC (20.04)

This PC is about a year old, and up until now I've had zero major issues with it. But since yesterday it has not been suspending properly. The keyboard and mouse lights shut off, but after a few ...
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6 votes
0 answers
46 views

Can you hibernate and resume one desktop session while keeping another running?

I'm going to trample on well-travelled jargon here, so please don't get too hung up on the exact words. I have a desktop that I use in a multiseat configuration. Two graphics cards, two monitors, two ...
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upower.service fails to start ubuntu 20.04

I just upgraded from Ubuntu lxde 18.04 to Ubuntu lxqt 20.04, and I encounter some problems with upower.service not starting properly (at boot-up and when I try to launch the service with sudo service ...
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Suspend/resume recently broke

I have a PC I built about a year ago, it's been working fine without issues, and suspend/resume from suspend has always worked great. Just in the last week or so though suspend functionality broke. ...
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  • 111
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1 answer
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Cannot reboot the laptop using an external monitor. Boot stalls

I'm having issues rebooting my laptop using the external monitor and the laptop docked with the lid closed. I tried out the live version of Ubuntu using the laptop with the lid closed and my monitor ...
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