Questions tagged [powertop]

PowerTOP is a Linux tool to diagnose issues with power consumption and power management.

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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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12 views

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

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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0answers
2k views

Fedora battery life and tick_sched_timer

I recently installed Fedora 30 for work on my Gigabyte Aero 15X v8. I blacklisted nouveau drivers as I don't need the discrete GPU while working and installed TLD. But even after that, the battery ...
0
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1answer
128 views

Unable to set power tuning parameters at boot time from systemd

I'm using Fedora 30 on a laptop. I've tried setting power tune parameters using the systemd service that comes with powertop (powertop.service) and that didn't work. I then tried creating a shell ...
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1answer
167 views

powertop shows significantly more than 100% “C0 active” - isn't this impossible?

I ran a process which uses 100% CPU: stress -c 1. In powertop, the "Idle stats" tab shows about 120% "C0 active" for the busy logical CPU. By contrast when turbostat is used, turbostat --show Busy% ...
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0answers
389 views

laptop-mode-tools causes power saving behavior on the intel HDA sound card, despite /sys/module/snd_hda_intel/parameters/power_save being 0

I've run into a peculiar issue. Let me describe: (please read EDIT2 as it gives the most important piece of the situation) On boot, from GRUB I pass argumentssnd_hda_intel.power_save=0 snd_hda_intel....
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0answers
805 views

Reduce high power consumption by keyboard and trackpad

I am running Fedora 27 on a 2014 11 inch MacBook Air, using GNOME 3.26. I only average about 5 hours on battery instead of the 9 hours this model would last running Mac OS. I know getting the 9 hours ...
1
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1answer
680 views

Why does this USB device not autosuspend?

Running powertop and tabbing over to "Device stats", I see 100% usage - which means no autosuspend - for "USB device: usb-device-8087-0a2a". Googling this ID tells me it is a bluetooth device. Or ...
5
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1answer
698 views

card reading killing my battery, on macbook pro running Debian

I am currently using a macbook pro but the operating system is debian 8.2 not os x I am using a macbook pro but there's this one device that's just draining a lot of power. This USB device: Card ...
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0answers
324 views

Linux Wifi High Power Consumption

I'm running Fedora 20, kernel 3.15.6 and ath9 driver with an ateros card. My battery life is very short, on an older debian install I had around 3 to 4 hours, now I'm between 1 and 2 hours. Powertop ...
2
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0answers
818 views

High varying discharge rate

I got an Asus N76VB notebook. On Windows I can easily stay on battery for 3-4 hours in powersave mode, but on Linux (first Ubuntu 14.04, currently Fedora 20) the battery's discharge rate varies from ...
4
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1answer
2k views

Two “Audio codecs” have 100% power usage in PowerTOP - what does this mean?

Should I be worried? My battery power doesn't last long (~1hr), could this be the reason? How can I fix this (if it has to be fixed at all)?
7
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1answer
4k views

Powertop doesn't display Power est. column

When I run powertop, it doesn't display the "Power Est." column that shows the estimated power consumption in Watts of each row. It should look like in the screen capture here: MacBook Pro Retina: ...
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0answers
2k views

MacBook Pro Retina: huge power consumption

I'm currently running Debian/Jessie on a MacBook Pro Retina 10,1 15" (early-2103). Everything is going well (ethernet, WiFi, retina, etc.) but I worry about its power consumption. laptop-mode manages ...
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1answer
1k views

Openbox root autostart?

I want to run a script as root when the computer starts. This was earlier done in rc.local, but not anymore. What I've tried: putting the script in /etc/profile.d adding the /pathto/script.sh in /...
3
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1answer
1k views

Power consumption monitoring problem

I used powertop v.2.1 under Ubuntu 12.04 but it missed the power est. column.It's the same situation as described https://bugzilla.redhat.com/show_bug.cgi?id=796068‎ and that bug is supposed to be ...
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3answers
9k views

How do I make Powertop's suggestions permanent?

When I run Powertop, and look at the Tunables screen, about twenty things are listed as Bad. I can toggle these to Good by pressing enter, and when I do so, projected battery lifetime doubles. How ...
12
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2answers
12k views

Powertop tunables: what does it do?

I just installed Powertop 1.98 on my laptop (T420 + FC15). There is a section called "Tunables". Half of my devices show as Bad. I see I can toggle from Bad to Good? What this section is for? What ...