Questions tagged [power-management]

Systems to manage power consumption, such as system suspension and hibernation, CPU speed adjustment, disk spindown, battery usage monitoring, …

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PowerTOP reports high CPU consumption

I am facing some Power Consumption issues on my new laptop(Dell Precision 5550) running Fedora 33. I've installed TLP, Powertop, Htop (but still issues). Checking PowerTOP I can see that it seems like ...
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System requires reboot when disconnected from power

My system works fine when on AC but once it is unplugged it starts to lag unbearably.I believe it is not a hardware issue because if it is plugged back to power or restarted on battery the system ...
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How can I use a USB keyboard or mouse to wake from suspend?

I am using GNOME 3.36.6 on Arch Linux. By default, GNOME's automatic suspend option is enabled and it works as expected. However, I have to press the power button to wake the computer from suspend. I ...
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How to appropriately set spindown (Power Management) when using SnapRaid?

I run openmediavault 4.1 and changed from RAID6 to SnapRaid with 7 hard drives for data plus parity. I remember reading installation advice on RAID setup that said "never set spindown for HDD&...
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Multiple issues after fsck on Mint 19.2 + MATE Dell Laptop

I'm using Linux Mint 19.2 with the MATE DE on a Dell Inspiron Laptop. Due to booting problems, I had to do a file-system check (fsck) on my hard disc. Now it boots properly, but possibly because of ...
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How to match AC and battery settings

As a new Linux user, I posted this question on both AskUbuntu and the Ubuntu Forums, but with no luck, so I'm hoping someone here can help me. I have an ASUS A15 with Ubuntu 20.04 installed. I've been ...
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Processor is slower after switching from AC to battery and back

I've noticed that my system slows down after switching to battery, but doesn't speed up once it's plugged in again. For example, if I run a portion of an R script after booting, it finishes in ~25 ...
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simplest way to enable user (non-root) to suspend laptop

My laptop has suspend capability: # cat /sys/power/state freeze mem and indeed I can suspend as root: echo -n mem > /sys/power/state This works fine. But what would be a minimalist way to enable ...
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What is difference in unit between energy-full vs charge_full?

I have 2 different results of maximum batery energy: upower -i $(upower -e | grep -i bar) | grep energy energy: 18.061 Wh energy-empty: 0 Wh energy-full: 33.4021 Wh energy-...
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With multiple events, ignore one event type and attend another in udev

Using GNOME 3.36. I have scripts run by udev that control the screen brightness when AC power is switched on/off. I also have a script that I want to run only when screen brightness is changed through ...
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Definition of 'inactive' in power management

Linux Mint. Power management provides an option to suspend when inactive for xx mins/hours. But I would like to know what 'inactive' means. I am wondering what 'inactive' actually means... some ...
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how to check the battery percentage of Apple airpods and case on linux?

is there any command for checking AirPods battery status on Linux. I am developer of i3blocks-airpods Just want to know if there is a way to check battery status?
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Why is systemd ignoring my power button?

When I press the power button nothing happens. System logs show that the kernel is detecting the button without issue: input: Power button as /devices/... ACPI: Power button [PWRB] Why isn't systemd ...
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How U-APSD works when only delivery enabled?`

Could you please anyone explain how U-APSD power save works for particular access category is only delivery enabled?
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Is Wi-Fi power saving smart enough to only actually take effect when on battery (no power plug)?

Referring to NetworkManager commit 6bb0cffba32ec925743c4d491b75474d4e855198 implementing dynamic power save (DPS) as advertised in "Manage Wi-Fi latency and dynamic power-savings on Linux", ...
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Wi-Fi powersaving in NetworkManager [duplicate]

I found this option in the file /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf : wifi.powersave = 3 But couldn't find detailed explanations about that in the manpage: wifi.powersave If ...
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How are WiFi or Bluetooth drivers affected by suspending or hibernating?

I was reading about power management in Fedora when I stumbled upon this When a system is suspended, the kernel calls on drivers to store their states and then unloads them. When the system is ...
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How to turn off Wireless power management permanently using systemd-networkd?

This question is very much related to How to turn off Wireless power management permanently, albeit when using systemd-networkd to manage hardware. I have a headless Raspberry Pi Model 3 connected to ...
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pp_od_clk_voltage: No such file or directory

I try to under-volt my hybrid GPU cause it's eating battery like crazy. I added to systemd-boot : amdgpu.ppfeaturemask=0xffffffff then switched to amdgpu.ppfeaturemask=0xffff7fff cause WattmanGTK ...
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Fedora/ Gnome: Disable sleep when undocking

Ask: I am looking for a way to stop my Fedora 32 notebook from going to sleep when I remove the external monitor (lid is always closed, it is always plugged in) Use case: I have a WFH setup where I ...
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1answer
84 views

Turn off monitor and poweroff

I want to power off my monitor at system shutdown. Tried the following: sleep 10; xset dpms force off; poweroff xset command turn off the monitor, but then poweroff exits from X and turn monitor on ...
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Defaultl ACPI sleep state in linux

As stated in the ACPI specification and also here , the sleep states (a.k.a G1 states) of the ACPI is as follows : G1/S1: Power on Suspend. The system state is preserved, so CPU and CPU Caches are ...
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53 views

Show current standby value from hdparm

hdparm allows me to set the time before the disk went to standby using the -S <value> flag. But how can I set what value is currently configured for standby? I tried # hdparm /dev/sda /dev/...
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77 views

WD HDD wokes up seconds after being set to standby

I have a ZFS raid with two disks. The homeserver is running 24/7 and the disks too. So I'd like to set them to standby after some idle time. Several posts recommend to test this with the -C param # ...
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Is there a systemd way to control cpu power profiles?

A lot of people suggest on i3 and swaywm to use scripts like this $ cat set_cpu_performance #! /bin/bash cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor for file in /sys/devices/system/cpu/...
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Random shutdown, logs empty

This is about Pop_OS, the Ubuntu fork, but since there is no askpopos and the reddit has more questions than answers, here goes: I installed the system two weeks ago and it has been running smooth, ...
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252 views

Horrible performance on battery with intel_pstate driver

EDIT: Ubuntu (mate) 20.04, intel_pstate driver. Computer is I am using a razer blade stealth ultrabook (early 2019), with intel core i7 i7-8565U. I am encountering odd behavior (extreme slowdown) ...
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Unable to resume from hibernation

When I resume from hibernation, I get a message that reads hibernation device 00b3d549-68fb-4678-a407-f86041bc241c not found. While I get the following: $ lsblk -f NAME FSTYPE FSVER LABEL UUID ...
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Laptop webcam uses about 4W although not used

Problem: Using powertop, I've noticed that my integrated webcam uses about 4W, although I don't use it. The value in the second column of powertop is 100%. Desire: I want the webcam consume less ...
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28 views

AP_POWER_STATE_REQ in Vehicle HAL

Tested with dumsys (dumpsys activity service com.android.car inject-vhal-event 0x11410a00 4,2). Upon executing the above command Board and display suspend for a few seconds (2-3 secs) and resumes. ...
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Prevent hard drive from powering on when resuming from suspend to RAM

My laptop running Debian testing (Bullseye) has two hard drives: the first with the OS and my documents, and the second containing data that I use rarely. There is no link between these two drives (no ...
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110 views

Ubuntu 18.04 laptop battery not detected

I have installed Ubuntu 18.04 on the SD Card of my surface pro but the battery indicator does not show. What I've tried from browsing online: 1. I've installed gnome tweaks and selected battery ...
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144 views

Who is throttling my CPU?

I have a Dell Latitude 5591 equipped with an Intel Core i7-8850H. This CPU has a TDP of 45 Watts, however it could be TDP-downed to 35 Watts. T-junction is specified as 100°C for this CPU. I am ...
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109 views

How to turn off fingerprint reader?

How can I disable and turn off the fingerprint reader embedded in my Dell XPS 13 (7390)? The device is a HTMIcroelectronics Goodix Fingerprint Device, USB ID 27c6:5385. Powertop warns that it is ...
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1answer
109 views

Ubuntu 19.10 Laptop wakes up immediately after suspend

When I try to suspend my Ubuntu ASUS laptop, it immediately wakes up. The laptop is a few months old and as far as I can remember, I've always had the issue. I tried to solve this problem with ...
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204 views

Why CPU temperature so much lower when on TLP Battery mode instead of AC mode?

I'm using Ubuntu 18.04 and TLP (Linux Advanced Power Management). When I have my laptop plugged and battery inserted and TLP is in auto mode (it detects the cable and goes AC mode), the CPU ...
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Why does my integrated webcam have two different device numbers?

My lsusb output is: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 005: ID 5986:112d Acer, Inc BisonCam, NB Pro Bus 001 Device 010: ID 045e:07f8 Microsoft Corp. Wired ...
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106 views

how to system-beep as low battery warning?

I'd like a debian laptop with LXDE to do a system beep every 10 or 30 seconds once the battery reaches a critical level. is that possible?
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Using TLP with a Docking Station - Docking Station not charging thinkpad

I am using a Lenovo X1 Carbon 6th Gen with a USB-C Gen 2 Docking Station. When I am not using TLP the docking station is charging my Thinkpad just fine. Also all peripherals work as expected. As soon ...
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How to remove noise in speakers?

After my operating system boots, I can hear repeatedly scratch-like noise from speakers. I googled this problem, and almost found solutions somewhere: if I type like a echo 0 | sudo tee /sys/module/...
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Detecting HP Envy x360 Ryzen5 3500u lid open/close?

I tested a lot of environment such as Ubuntu 19.10, Ubuntu Mint, Arch Linux, using Gnome, KDE Plasma etc. And they didn't work except Windows 10. They do nothing when I open/close their lid as I ...
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reasons for laptop shutting down

I have a laptop running Arch that I've been using for about 3 years now. Admittedly, I'm a bit sloppy on system updates, but it's in great shape aside from a few quirks with the graphics driver. This ...
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1answer
154 views

Linux Mint on Dell XPS 9570 - Power Issues, Inconsistent power-on

This is my first time posting on a linux help site, so be gentle. I've installed Linux Mint 19.3 "Tricia" on a 2018 Dell XPS 9570, 15" laptop. People have addressed this in many posts, including this ...
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256 views

How to deal with a screen that turns permanently black when closing the laptop lid, in Debian?

On a Thinkpad W530, running Debian 10 (with XFCE): The screen turns black after closing and opening the lid, and stays black. The computer remains on and is working, it is possible to SSH in over the ...
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Is it possible that a Logitech wireless mouse connected over bluetooth to a linux machine consumes more power, than when connected to other OS?

I have got a Logitech M590 connected over Bluetooth to my Ubuntu 19.10 (up-to-date), and it turns out that the battery of the mouse runs out after about two months while Logitech advertises two years ...
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Dell Inspiron 5559 touch screen flaky causing system not to boot

I have a touch screen on my Dell Inspiron 5559, and Linux will continually try to power cycle it and fail. It will sometimes never finish booting because of this. Is there a way to disable this device?...
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1answer
119 views

Automatic shutdown after no activity

I've recently inherited maintenance of a couple of Linux based internet kiosks basically just Ubuntu with a graphical session locked into Firefox. Anyway is there a ready made solution for sending ...
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28 views

Power consumption high, GPU 100% run, no RC6 state in powertop / turbostat

Debugging the high power consumption of my laptop I see in powertop that GPU is never goes to power saving states. If I give some load to GPU I can see in sudo turbostat --quiet --show GFX%rc6,...
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1k views

How to disable the power saving for snd_hda_codec_realtek?

I'm on Linux Mint 19.3 (Kernel 5.3.0-28) and my mainboard comes with a Realtek ALC887 onboard chip (snd_hda_codec_realtek). Due to the default power managment the power saving state switches on and ...
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136 views

Linux Commands to Force Intel CPU to desired C-State and Wake-Up

I have pinned some application – specifically, gvim – on core 1 with taskset with the command taskset 0x2 gvim.  Now I want to forcefully make core 1 enter a desired C-State at a desired time (not due ...

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