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Questions tagged [energy-saving]

89 questions
67
votes
15 answers

Can I sleep one of the displays on a multi-monitor setup?

I want to be able to 'put the display to sleep' on one of my two monitors when it isn't needed, so it doesn't distract me or use unnecessary power. Ideally, the display would be asleep, but the OS would remain in dual-monitor mode, so I could still…
Stew
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10 answers

Is it possible to power on/off a monitor using the computer?

I was wondering if it was possible to power on/off a display using a computer connected via HDMI. Let me explain : I want my computer to power off my monitors (not standby mode) when I don't use it (no keyboard/mouse input) for more than 15 minutes,…
3rgo
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22
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5 answers

Do not wakeup Mac on mouse movements

I never switch off my mac in the office, instead i use the energy saving mode to suspend the mac to disc. This is all working fine, but I have one problem: when the cleaning lady is cleaning the office, she also moves the mouse and the mac wakes…
bitboxer
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17
votes
3 answers

Turn off monitor (energy saving) while in text console mode (in Linux)

How to configure Linux text console to automatically turn of the monitor after some time? And by "text console" I mean that thing that you get on ctrl+alt+F[1-6], which is what you get whenever X11 is not running. And, no, I'm not using any…
Denilson Sá Maia
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16
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3 answers

How much power do video cards use after Windows turns your display off?

Modern video cards seem to use 150-200 Watts at idle. Does this mean that this is the minimum power the video card will ever draw while your computer is on? It's clear that if you are sitting at the Windows desktop and not doing much, this is the…
Greg
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12
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1 answer

Power Options: Turn off harddrive. Effective or dangerous?

I keep a PC running 24x7 as it handles several light (processor-wise and disk-wise) tasks and acts as a jumping point into my network from outside. I'd like to keep it as energy efficient as possible. I've always wondered about the "Turn off…
Kazen
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12
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3 answers

Is there any reason *not* to enable 802.3az (Energy-Efficient Ethernet) on a switch?

I have a PoE+ switch (ZyXEL GS1100-8HP) that has a button on the front to toggle IEEE 802.3az compliance. I looked this up and found that it was a power management specification known as "Energy-Efficient Ethernet". From the Wikipedia page, it seems…
Jason C
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11
votes
1 answer

Does raising LCD monitor contrast increase energy usage?

I've got a Dell S23340M - an LCD monitor with an LED backlight, which has built-in options to adjust the brightness & contrast. The monitor features a nifty "Energy Usage" bar that changes as you increase/decrease the brightness. When I increase the…
takanuva15
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1 answer

Is it possible to power off a PCIe video card/slot? (eg. hot-plug)

I'm looking at building a system that supports VT-d so I can pass through a high powered loud video card to a Xen/KVM/whatever VM (host will be Linux based). However, when I'm not using the VM I want to turn the video card off so its fan does not…
CR.
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9
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4 answers

How can I save energy when using a notebook?

I'm using a notebook as my only computer and I'm wondering how I might save the most energy (in terms of my electricity bill). Will it use less energy overall to only plug it in if the battery is low and unplug it as soon as the battery is loaded?…
Benedikt
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9
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3 answers

cannot hibernate anymore (but standby)

for some reasons my Windows-10 desktop PC (HP) cannot hibernate anymore (but standby works fine). PS C:\WINDOWS\system32> shutdown /h Element nicht gefunden.(1168) (element not found 1168) Solution: Disabling secure boot in UEFI. (thanks to "John…
Falco Alexander
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6
votes
1 answer

Windows 10 time-controlled power settings?

Is there a way to configure Windows that it uses different energy profiles at different times? For example: Between 8:00 PM and 6:00 AM I want Windows to use the "Power saver" profile and between 6:00 AM and 8:00 PM I want Windows to use either the…
Dennis
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6
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2 answers

btrfs-transacti writes to disk every 30 seconds

I'm running Ubuntu 16.04.2 LTS with btrfs on 4 8 TB Seagate drives in RAID 1. Every 30 seconds btrfs-transacti shows up in iotop with ca. 80 M/s for 15 seconds, even when the system is not used. The system is only used for storing backups once a…
Christian
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5
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1 answer

How to disable a plugged-in PCI-e graphic card on OS level?

I have a server running for which I want to have a possility to access it with a screen connected to VGA (very rarely, most of the time it's accessed via SSH). Therefore I have a PCI-e graphic cards plugged in and the VGA cable removed. The graphic…
Kalle Richter
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4
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1 answer

How can I enable the deep RC6 sleep states on an haswell architecture?

If you use iotopyou will see three sleep states. One is called RC6 and the other two are deep sleep states called RC6p and RC6pp. I read the modinfo i915 and saw that one can enable them by passing enable_rc6=7 to the kernel. parm: …
ManuelSchneid3r
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