Power management refers to the capability of a computer or its operating system to regulate its power usage. This can help achieve cooler and quieter operation, longer-lasting electrical components, and for laptops, longer battery life.
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Wireless USB keyboard and mouse can wake system, but then receiver is inactive
I have a Microsoft brand USB device that acts as a receiver for a wireless Microsoft Keyboard and a wireless Mouse. When it's operating normally, there are LEDs on the device indicating Caps Lock, Num ...
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0answers
2k views
Why does my display dim then get brighter on my HP laptop [closed]
I'm posting this question actually with an answer so as to maybe help others who have experienced it. Now, please keep an open mind...
I recently purchased a new HP notebook running Windows 7. I like ...
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0answers
68 views
No monitor after Windows 7 update
I recently installed Windows 7 on a Toshiba Satellite laptop. After updating, my machine would start but the screen remained off.
I was able to fix this by connecting an external monitor. The ...
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1answer
237 views
How to stop my laptop from throttling my CPU?
I have an AMD TL-60 mobile processor. I've noticed that often when I watch videos, I get a really jerky playback. I can fix it if I run the following command:
echo 2000000 > ...
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4answers
3k views
In Windows 7, why won't my display stay off despite the power settings saying it should?
I'm completely stumped by this. My simple use case is that when I'm in bed, I use a cordless mouse to browse the web, watch videos, etc. - the monitor is across the room. When I'm going to sleep, I ...
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0answers
272 views
Windows 7 won't wake when opening lid
I've got a Samsung Series 5 laptop running Windows 7 SP1 Home Premium, fully patched.
It used to wake up from sleep by opening the lid, when I would put it to sleep by closing the lid. Unfortunately ...
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0answers
145 views
How to find out which program prevents monitor going to sleep on Windows XP?
On a machine running Windows XP I have the problem that the monitor often does not enter standby/sleep mode. I guess this is caused by some program that is running, because it reliably works if I ...
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1answer
266 views
HDD light blinking every second
some people asked about it already, but in my case it isn't a problem with the CD drive (it happens even when I take it out). I run procmon from SysInternals for a while and found out, that ...
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1answer
220 views
Debugging Windows 7 system that has lost ability to enter Sleep state on its own
I have read articles here and elsewhere looking for the root cause of this problem. The system is a Win7/32 desktop used as a media center. The application is SageTV. The system has been running and ...
2
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1answer
152 views
Is there an instrument or software that can measure the ACTUAL maximum power available to a USB port?
I use a non-self-powered USB modem device for a solutions I provide to multiple customers, and very often I encounter a problem in which the devices stops working due to many reasons, one of which I ...
3
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2answers
2k views
Windows 8 shuts itself down when told to sleep
It's been too many nights when this happened:
Decide it's time to sleep
From the Settings charm, pick Power then Sleep
???
Wake up several hours later
Turn the computer back on and it's a fresh ...
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1answer
484 views
xfce power-manager->monitor difference between sleep/switch off
If I go to Settings-PowerManager->Monitor tab there are (among others) two sliders for management.
1. "Put Display to sleep when computer is inactive for:"
2. "Switch off display when computer is ...
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2answers
2k views
Turn off USB power when closing MacBook lid
I have a USB-powered cooling pad under my MacBook Pro. When I close the lid to put my MacBook to sleep, I would like the cooling pad to turn off. In other words, I would like the MacBook to cut ...
2
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1answer
780 views
Windows 7/ATI graphics: GPU fan speeds up when display goes into sleep mode
I am using Windows 7 Professional 64-bit with an ATI Radeon HD 4870 video card with latest drivers (Catalyst 12.4). In normal desktop Windows use, the fan of my video card powers down and is so quiet ...
4
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2answers
335 views
Automatically disable devices to save power and mitigate DMA attack in Windows 7
Some OEM include energy saving apps that can switch off certain devices such as webcam or optical drive. Is there any brand-agnostic app out there that can do it? If the list of disabled device is ...
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0answers
38 views
Recent update hid my ability to adjust my Vista HP laptop screen brightness when running on battery
Recent windows-update hid my ability to adjust mylaptop screen brightness when running on laptop-battery... Does anyone know which update so I can un-install it or anyone know where I might be able ...
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0answers
56 views
Windows System shutdown on always on
I need ideas as to why this Windows XP system shutdowns. I've edited all the power options to always on. Is there anything else that could maybe be overwriting that?
No crashing.
Just after x amount ...
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3answers
3k views
Cannot change power button or lid close action
I have a Samsung 900x laptop and I want to change it so that when I close the lid, nothing happens (I often close the lid to carry it somewhere 10 seconds away, and by putting it into suspend it ...
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1answer
4k views
How do I make ESXi 5.0 to shutdown virtual machines when the physical power button is pushed?
I have a home NAS/DLNA server built out of an HP Micro Server with the HP branded VMware ESXi 5.0.0 build-623860 (free license) installed. Being a home media center I'd like it to be "manageable" by ...
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2answers
409 views
Laptop wakes from sleep, once, due to audio controller (Windows 7)
The laptop is a recent Dell XPS 15z and the problem is as follows (reproducible about 90% of tries):
put laptop to sleep using either Start->Sleep or closing the lid
laptop goes to sleep after about ...
4
votes
1answer
126 views
What is the minimum length of time it is worth hibernating my laptop? [closed]
I have a Windows XP laptop. I rarely reboot and usually just hibernate it when I'm finished using it. If I'm going for lunch for an hour for example, I will always hibernate. However, if I'm just ...
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1answer
293 views
Virtual PC - power consumption
I would like to know, how power consumption works.
I have a windows 7 host and a ubuntu desktop guest. When running, does it consume power for both systems? Or just for windows? Does reducing virtual ...
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1answer
368 views
Underclocking/Power saver mode in Ubuntu 9.10
I'm using a laptop (Intel Pentium Dual T3400, 2GB RAM, Intel GL40 chipset), dual-booting with Windows Vista Home Premium and Ubuntu 9.10.
Majority of the time, Windows is used. However, when I have to ...
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0answers
98 views
Linux and battery usage [closed]
I want to install a linux distro on my laptop but I do not want to have a massive battery drain. I remember reading some kernels drain the battery faster then others? Would Mint Linux or Ubuntu out of ...
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1answer
241 views
Quick and easy power management software for Win 7
Probably one of the most disappointing things for windows 7 is the power management.
It's clunky, there's no quick option to kind of just go "do not sleep" or "sleep at this time" or "sleep in n ...
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0answers
780 views
Asus laptop not retaining Aero theme when unplugged
The problem i'm having occurs when i unplug my laptop, it disregards several elements of my theme.
The taskbar gains "auto-hide".
My desktop background is turned white.
The transparency on my ...
2
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0answers
74 views
Why does waking a PC up with a timer act differently than with the power button?
I have a Windows 7 machine set up as a server. It has no monitor and is only accessed through remote desktop. I set up two scheduled tasks, one to put the computer to sleep at night and another to ...
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0answers
590 views
Wired network adapter doesn't function properly when starting Windows
Every time I start my computer, my wired network adapter stops working - this includes a cold start and resuming from sleep. If I head over to Network and Sharing Center and click Troubleshoot ...
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0answers
171 views
Dell C840 hangs on resume from standby
I have an older laptop - Dell Latitude C840 - with Windows XP Pro SP3. Everything works fine except for standby. It will go into standby but has great difficulty getting back out. On resume, sometimes ...
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0answers
229 views
Logoff user instead of shutting down when PC's shutdown button is pressed?
I know of the Sleep, Do Nothing and sometimes Hibernate options in control panel power management but is there a way to Logoff users when the power button is pressed on the physical machine instead of ...
2
votes
1answer
329 views
Vista laptop keeps waking up a minute after I put it to sleep
I have used the command
powercfg -lastwake
to determine what is waking up my computer. Here is what it produces in prompt
Wake History Count - 1
Wake History [0]
Wake Source Count - 1
Wake ...
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2answers
576 views
CPU performance fluctuates wildly
CPU: Intel Core 2 Duo P8400 @ 2.26GHz.
I've had this laptop for about 3 years and in the past month I've started getting periodic framerate drops in games. Usually the pattern is random, something ...
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0answers
506 views
Dynamically disabling cores in a power-efficient way?
I am looking for a mechanism to dynamically disable cores in Linux in order to minimize power consumption.
Unfortunately, disabling cores using the following simple approach actually increases power, ...
4
votes
1answer
370 views
Difference between suspend to “mem” and pm-suspend
What is the difference between
echo "mem" > /sys/power/state
and
pm-suspend
Both can put the computer to sleep mode. I want to execute a script automatically when the system resumes from ...
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2answers
599 views
Triggering tasks and running programs when Windows 7 is plugged in or unplugged? [duplicate]
Possible Duplicate:
Is there a way to execute a program on power events?
Is there a Windows event that I can watch in Task Scheduler that will trigger when the power is plugged in? And an ...
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2answers
1k views
Reduce power consumption of gaming computer while idle
This is my current build:
EVGA X58 (first generation) motherboard
Intel i7 965 clocked @ 3.3 Ghz
3x DDR3-1600 Corsair RAM at stock timings and voltages
Corsair AX750 80 Plus Gold PSU
1 ...
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1answer
565 views
Why am I having issues waking up my machine (and how to debug)?
Recently I switched from buying off the shelf machines to building at work (Building AMD FX-6100 or FX-8100, older ones are A8 series or Phenom II, with Windows 7 Pro). Without going in to the ...
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2answers
2k views
Windows 7 directly turn monitor off when just listening to music
Windows 7, Laptop DELL XPS 1330:
When just listening to music, I want to turn off my laptop display immediately. It perfectly works after the usual delay (e.g. 10 mins) set in the power management, ...
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1answer
144 views
Is My PSU compatible with this UPS
I have this PSU and this UPS, however due to the PSU being/having an active PFC (power factor correction) it is incompatible with my UPS (at least according to APC tech support, for reference see my ...
3
votes
3answers
996 views
Computer hangs due to underpowered UPS?
I just bought a new UPS. Now since I started using it I experienced at least 3 random freeze in Windows 7 and it happens during the first 10 minutes of start-up. Note when I say freeze, I mean I ...
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1answer
263 views
Turn off display on macbook 1,1 running ubuntu server 11.10
I am just getting started with my own server and thought I could put my old black macbook to some use.
I installed Ubuntu server 11.10 as the only operating system and everything has been working out ...
2
votes
4answers
4k views
Does a UPS charge it's battery even if my computer is turned on?
I bought a new UPS and the manual says something like "the UPS must charge for 24 hours before it can work properly..."
My question is, does it charge even if my computer is turned-on or should I ...
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1answer
839 views
How do I tell Windows 7 that I don't have a battery backup?
One of my computers recently started going to sleep at seemingly random intervals. Upon examining the system log, the reason is always the same. "The system is entering sleep. Sleep Reason: ...
2
votes
1answer
136 views
How can i see list of powered devices in my laptop?
I want to see all powered devices. I know about powertop. But that can't recognize device that isn't truly used. For example, my networkmanager is badly configured and wifi is powered on, i don't use ...
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1answer
364 views
Second HDD automatically stops after 30 seconds of inactivity
I have ASUS G53JW notebook with two HDDs (2x500GB Seagate ST95005620AS). Second HDD automatically stops after 30 seconds of inactivity. Always. I'm using Windows 7 x64. If I run a game from this HDD ...
4
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1answer
100 views
Why doesn't a phone li-ion battery die for 5 years and a pc li-ion battery dies in 1-2 years? [closed]
WHat is the major factor? heat?,size? consumption style like full discharge?
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3answers
314 views
How to plug-in this hard drive?
I need to install this hard drive "WD800JD-60JRC0". It is Serial ATA. But what really confuses me is that it has molex connector. I think I can plug what I want: SATA power cable or Molex. But which ...
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2answers
3k views
How do I get my disks to spin down after one hour?
I'm currently configuring a new home server, and I am trying to get the disks to spin down after one hour. But they do not spin down.
Setup
I have my entire system on an ssd: /dev/sda. I have three ...
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1answer
123 views
Downgrading gaming pc to NAS box
I currently have an old gaming pc which I wish to turn into a NAS box.
Im aware and understand the way to install, im more interested in reducing power consumption.
I thought if i removed the ...
2
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1answer
241 views
Ubuntu - application-specific power management
I listen to lots of music while doing non-computer related stuff and my laptop falls asleep after 30 mins, as per my power settings, so I have to go back to the laptop to wiggle the mouse every now ...
