Questions tagged [power-management]

Questions related to power management, particularly power saving measures.

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how to set threshold for the battery charging?

I'm on ubuntu 18.04 .. first Does this command make laptop using the charger not the battery ? and Does the battery using off ? user@user:~$ sudo tlp start TLP started in AC mode (auto). how can i ...
0 votes
1 answer
636 views

Excessive battery consumption

I've tried the powertop method, but really it didn't help at all. The system power saving settings are quite plain,providing no help compared to Windows 10. I am now unfortunately forced to charge my ...
190 votes
5 answers
188k views

Is there a power saving application similar to Jupiter?

I'm trying to install the Jupiter power settings app but, I read it is no longer compatible with the new kernel. Is there a similar program or a way to manage the power settings on 13.04?
0 votes
1 answer
318 views

Monitor system usage to fix power consumption issues

I'm running Kubuntu 18.04, and I want to do some system profiling. My main goals are to improve startup speed and power usage. What instruments can I use to profile daemons/processes to get the time ...
2 votes
1 answer
476 views

"systemctl suspend-then-hibernate" without asking for root permissen

I would like to add this command "systemctl suspend-then-hibernate" to a key-combination (ALT+s). For some unknow reason it ask for permission, but it doesn't ask for "systemctl hibernate" or "...
0 votes
1 answer
907 views

Nvidia GPU slows down when laptop is plugged to AC

I have a laptop with a Nvidia GeForce MX130 and an Intel i5-8250U. I'm using the Nvidia driver 440. When the laptop uses the battery, it works fine, but just when I plug the charger everything slows ...
1 vote
1 answer
2k views

Ubuntu 19.10 - Laptop won't reboot/shutdown if the lid is closed (SSH)

I'm using an HP laptop as a server, so the lid is almost always closed and it is the only display "plugged". I have configured Ubuntu to "do nothing" if the lid is closed and AC is plugged and this ...
0 votes
1 answer
1k views

Ubuntu drains too much battery in my laptop

I switched from Windows to Ubuntu 3 months ago because of the degree I'm studying (CS) and didn't feel like doing my homework on a virtual machine because it wasn't really fast. However, my battery ...
1 vote
0 answers
154 views

Ubuntu 18.04 Suspends only after lock

it looks like my installation of Ubuntu is having some issues with the order of operations. Whenever I try to suspend the system using the systemctl suspend command or by closing the lid after ...
4 votes
2 answers
1k views

How to keep Wake On WirelessLan enabled after shutdown / reboot

My Latitude E7240 running Ubuntu 18.10 has Wireless Wake On Lan capability and the option is enabled in the BIOS. While the Wake On Lan is working like a charm with ethtool, the Wireless variant ...
2 votes
1 answer
2k views

Powermanagement for ubuntu laptop

Im quite new to Linux and I want to install Ubuntu on my Thinkpad T480s with hybrid grafics (intel+nvidia). Im looking for things/tools/settings/packages that help to increase efficient power ...
0 votes
0 answers
597 views

18.04: Gigabyte Aero 15x, laptop charger detected but battery not charging

I successfully installed Ubuntu 18 in a new Gigabyte Aero 15x laptop. Everything's working fine, except for the battery. If I turn on the laptop with the charger connected, then no problem, Ubuntu ...
1 vote
1 answer
75 views

Hibernate works in console, not in power menu

Running sudo hibernate in console works just fine, and allows me to restore it, but using the hibernate option on the power menu just shuts down the computer, losing my session. I enabled it in the ...
3 votes
2 answers
3k views

Touchpad doesn't respond when power is plugged

Upon upgrading Ubuntu 11.04 through 12.04 on a Dell System, the touchpad doesn't respond until the power plug is unplugged. Any idea why? To better clarify the behaviour of the touchpad: The touchpad ...
2 votes
1 answer
530 views

CPU frequency capped

My CPU works fine during 30 seconds then drops to 800MHz. My BIOS does not have power management. All my temps are OK: around 65° at max. I read every forum posts on the subject, tried everything. ...
0 votes
0 answers
44 views

I want to save my Battery

My battery power is dropping rapidly. I have already install the TLP and for every boot up I keep my tlp in battery mode. But still it is unsolved.
2 votes
1 answer
2k views

High GPU RAM and power usage after nvidia-drivers update

I updated my nvidia-drivers from 430.1 to 440.44 to install the latest cuda software 10.1 (which suggested that I need to update my nvidia drivers to 440). After the update, it seems that there is ...
1 vote
0 answers
332 views

Wake on LAN stopped working 19.04

Wake-on-LAN was working in 19.04 just fine, then I left my computer on full time for a few weeks, now WOL no longer works to wake up my desktop from suspend mode. The sudo ethtool enp2s0 |grep Wake ...
4 votes
1 answer
6k views

Ubuntu 18.04: Where are the power management profiles?

Back in Unity, there were options in the settings program to manage power settings important to laptops, such as: Specify different behaviors for things like dimming the screen or suspending the ...
0 votes
0 answers
301 views

Shuting down makes power LED blink

I have an Ubuntu 18 server (no GUI). When I shutdown the computer, everything shuts down (power supply, fans, etc), but the power LED is blinking like it's on stand-by. The shutdown line I'm ...
1 vote
2 answers
3k views

Closing lid doesn't suspend on 19.10 [duplicate]

Ever since I upgraded to 19.10, when I close the lid the laptop doesn't suspend anymore. It doesn't even lock the screen. It almost seems like the OS isn't picking up the close lid event. If I press ...
3 votes
1 answer
1k views

i2c_designware seems to have problems during shutdown

So I'll try to shutdown my Lenovo Yoga 920 with Ubuntu 18, and maybe walk away, and sometimes the computer won't actually shut down. Sometimes I try to power it off and then put it in my backpack, ...
3 votes
0 answers
161 views

Unknown Device in power notifications

I'm new to Ubuntu. I kept seeing power notifications and assumed they were for the battery. But then I found that they actually were for another device: ELAN2514:00 04F3:262C. That device is unknown ...
4 votes
0 answers
349 views

Kubuntu 19.10 Doesn't Suspend Properly Using Home Folder Encryption?

I have a nearly fresh install of Kubuntu 19.10 and encrypted my home folder using ecryptfs-migrate-home using the typical method. This had led to an issue where, when I suspend my computer by closing ...
2 votes
1 answer
157 views

Is it safe to hot swap batteries of different capacities?

I have two batteries for my laptop of differing capacities. I took out the larger battery today and hot swapped it for the smaller battery as I had not used it in a while an I wanted to make sure it ...
0 votes
0 answers
545 views

Battery 100% but work as 0%

I'm on Ubuntu and bought this battery since 5 months only .. now I'm facing problem with it .. i found the led of battery is on and charge with 100 % but when i plug out the charger .. laptop is off ...
2 votes
0 answers
989 views

Ubuntu 19.10 - Freeze when waking from suspension

I think it is a common problem, but I was hoping that someone might know something... I have an ASUS 433 Zenbook, with an AMD R5-3500U APU. (I.e., no NVIDIA). When I put the Laptop in suspend mode, ...
1 vote
2 answers
1k views

Power management Ubuntu 19 not working

I just installed Ubuntu Studio 19 and I've adjusted my power management settings to NEVER switch off or go to sleep but it still blanks my screen. I double checked my monitor and it's not doing it by ...
-2 votes
1 answer
9k views

Wake on LAN the Raspberry Pi 4B [closed]

I ask here although there is a good thread because I don't want a facebooq or googre account. I'd like to understand how I could wake a Pi after shutdown/halt/power-off. Querying the embedded ...
4 votes
3 answers
5k views

Why is my screen going black after a minute or less of no input activity?

Today I edited by GRUB parameters to add a parameter that supposedly solves a problem with locking up after standby on my CPU (Intel Pentium quad N3540), as seen at the end of this line in the GRUB ...
1 vote
0 answers
733 views

Prime-select doesn't work on Ubuntu18.04

So I have both an integrated Intel GPU and a NVIDIA card. I am trying to switch between the two using prime-select. I have the bug https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363 - ...
1 vote
0 answers
78 views

Ubuntu 18.04. Gracefull Shutdown

I am having this issue with Ubuntu 18.04. where it does not shutdown gracefully and then boots into Grub recovery mode when I start it back up. This typically happens if I don't close each and every ...
2 votes
1 answer
556 views

Hibernation fails with closed lid and external monitor connected Ubuntu 18.04

I have configured hibernation on my laptop. It works as intended now as long as there is not external screen connected. I often connect a second screen and close the lid of the laptop. It's set to do ...
0 votes
1 answer
557 views

Does Ubuntu reduce battery life? [duplicate]

In this this page of the Ubuntu help it says that using Ubuntu reduces battery life than compared to using Mac/Windows. What does that exactly mean? Does "battery life" mean here the number of hours ...
1 vote
1 answer
1k views

lenovo t490 draining battery - TLP not helping ( ubuntu 18.04 )

I would need your help. As much as I don't want to get back to Windows if I was not able to resolve this, I would be (most likely) forced to :( I have a Lenovo ThinkPad t490, ubuntu 18.04 and my ...
22 votes
4 answers
101k views

Power on/off USB ports

Is it possible to on/off a specific USB port using the terminal in Ubuntu? lsusb displays the following result: Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 ...
1 vote
0 answers
249 views

Battery not charging after installing Ubuntu 19

I dual booted my Windows 10 laptop with Ubuntu 19.10 and immediately after installation, when I restarted my laptop I detected that the laptop is not charging even though the battery is detected. Even ...
0 votes
0 answers
107 views

Ubuntu 16.04 Server: Battery is always 0% and laptop turns off when unplugged. Also battery voltage is ~12V

I have an old laptop running Ubuntu 16.04 Server. A week ago I noticed strange shutdowns happening. As no software problem was discovered, I discussed the problem with a local hardware specialist who ...
0 votes
0 answers
157 views

pm-suspend prevents me from turning the computer on in any way

Ubuntu Server 18.04 with all of the standard configurations from apt upgrade. No custom kernels or anything out of the ordinary. SUPERMICRO MBD-X10SL7-F-O i3-4160 16GB ECC various disks for use as ...
2 votes
1 answer
5k views

Is using the shutdown command to turn off the system safe?

I have seen many articles and posts stating that a way to turn off the system via the terminal is issuing the shutdown -h now command. It obviously works on my system, but it shuts down everything ...
1 vote
1 answer
873 views

Ubuntu Gnome 16.04 - Missing Power off Option in Power settings

My machine is having Ubuntu Gnome 16.04 which is upgraded from 14.04. Even though my Power menu mentions "Suspend and Power off", I don't have a power off option. I am not able to set my system to ...
0 votes
0 answers
115 views

Ubuntu 18.04 LTS-goes standby continuously

my Laptop Toshiba Satellite Pro A300 works ok on Win Vista 64 and various Linux distros (Centos6, Slackware). I recently updated to Ubuntu 18.04 LTS(dual boot with Vista), but as soon as the OS starts ...
1 vote
0 answers
854 views

Lenovo S740 (i7-9750H) Extremely Poor Battery Life on Ubuntu 19.10

I need some urgent assistance with my new Lenovo S740 and battery life on Ubuntu 19.10. I purchased this laptop for development work but the battery life has been so abysmal that I am considering just ...
11 votes
1 answer
55k views

How to disable auto sleep in Ubuntu 18.04 [duplicate]

I recently installed Ubuntu 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 ...
0 votes
0 answers
300 views

Preventing suspend / sleep / hybernate of a server running LXDE on Ubuntu 18.04 after power up before login as a user

Anyone knows how to keep an Ubuntu 18.04 file server with LXDE from going to a low power mode after power up? Problem description: I usually access my home server remotely with teamviewer. If power ...
3 votes
2 answers
2k views

Automatically reduce brightness on battery in Ubuntu 15.10?

How can I automatically reduce brightness when I unplug the AC in Ubuntu 15.10? I tried modifying dconf-editor settings as suggested here, https://askubuntu.com/a/312619/511925, but there are no ...
1 vote
1 answer
2k views

Takes too much time to update battery status on power failure

I have a UPS (Back-UPS ES 850M2) connected via USB to my desktop PC (Ubuntu 19.10). When I disconnect the power cord, the battery in the top bar does not change, take between 2 and 5 minutes to ...
0 votes
1 answer
1k views

Battery Percent/Capacity elaboration in power statistics

In power statistics under the battery, I noticed that it gives me a "Percentage" and "Capacity" in percent. I'm not sure I understand this right, but does this mean that the battery's capacity is now ...
1 vote
0 answers
64 views

Screen Suddenly Going to Screensaver

In Ubuntu 19.10, I do not have the screen saver enabled and indeed it hasn’t been coming on until today when it suddenly started locking after only about thirty seconds, requiring my password to log ...
2 votes
0 answers
574 views

Probably unnatural battery drain on a Dell XPS 13

Ubuntu 19.10 on Dell XPS 13 here. Ever since my update to Ubuntu 18.10, the battery drain of my laptop has become very fast. My computer is 2yrs old, so it's maybe unfair to compare its currently ...

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