Why does turning on/off a desk light wake up my PC?

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martinlest

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I can't see a Windows option for this! When I turn off my lamp, my PC wakes up from standby. I'd rather it didn't - any 'fix'? (The PC powers from the mains via a UPS).

Thanks!
 

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Windows 7 Home Premium SP1 64-bitIntel Core i7-4790K CPU @ 4.5GHz16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz8GB NVIDIA GEFORCE GTX 1070
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Custom Build
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Custom PC used for X-Plane 11
Hi martinlest,

martinlest said:
I can't see a Windows option for this! When I turn off my lamp, my PC wakes up from standby. I'd rather it didn't - any 'fix'? (The PC powers from the mains via a UPS).
Click to expand...

Maybe it is something to do with the interference/change in the power!
 

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Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux...Intel(R) Pentium(R) CPU P6200 @ 2.13GHz4.00 GBIntel(R) Graphics Media Accelerator HD
Computer type
Laptop
Computer Manufacturer/Model Number
Fujitsu LIFEBOOK
OS
Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
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Intel(R) Pentium(R) CPU P6200 @ 2.13GHz
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FUJITSU FJNBB06
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4.00 GB
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Intel(R) Graphics Media Accelerator HD
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1366 x 768 x 32 bits (4294967296 colors) @ 59 Hz
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TOSHIBA MK5076GSX
Antivirus
AVG FREE
That I never hear about.

- What kind of lamp you turn off (filament, electronic gas tube or electronic led)? Electronic has a rectifier that generates harmonics.
- Does the UPS has a USB cable connected to the computer to shut it down in case of a power failure? Are the UPS battery's still holding energy?
 

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System One System Two

  • At a glance

    Windows 7 HP 64i5 6600K - 800MHz to 4200MHz4+4G GSkill DDR4 3000IG - Intel 530
    Computer type
    PC/Desktop
    Computer Manufacturer/Model Number
    custom build
    OS
    Windows 7 HP 64
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    i5 6600K - 800MHz to 4200MHz
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    GA-Z170-HD3P
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    (3) -1 WD SATA 3 - 1T for backup
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    Thermaltake 450W TR2 gold
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    Old and good Chicony mechanical keyboard
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    Logitech mX performance - 9 buttons (had to disable some)
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  • At a glance

    Windows 7 Proi7-4500U 800MHz to 3.0GHz(4+4)G DDR3 1600IG intel 4400 + NVIDIA GeForce GT 745M
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    Asus Q550LF
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    Windows 7 Pro
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    1T HDD for data
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    500 Mb/s
    Browser
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    TinyWall firewall
It may be caused by vibrations caused when actually turning off the light, being transferred to the mouse & waking the computer. Try turning the light off more gently or use a mouse pad to reduce vibrations being transferred to it.
 

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Self built using existing case
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Windows 7 Home Premium 64 bit sp1
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Intel i5 3570 3.4Ghz Ivy Bridge SKT 1155 quad core
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Ranger4 said:
It may be caused by vibrations caused when actually turning off the light, being transferred to the mouse & waking the computer. Try turning the light off more gently or use a mouse pad to reduce vibrations being transferred to it.
Click to expand...
Good point :thumbsup:.
 

My Computer My Computer

At a glance

Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux...Intel(R) Pentium(R) CPU P6200 @ 2.13GHz4.00 GBIntel(R) Graphics Media Accelerator HD
Computer type
Laptop
Computer Manufacturer/Model Number
Fujitsu LIFEBOOK
OS
Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
CPU
Intel(R) Pentium(R) CPU P6200 @ 2.13GHz
Motherboard
FUJITSU FJNBB06
Memory
4.00 GB
Graphics Card(s)
Intel(R) Graphics Media Accelerator HD
Sound Card
[1] Realtek High Definition Audio [2] Intel(R) Display Audio
Screen Resolution
1366 x 768 x 32 bits (4294967296 colors) @ 59 Hz
Hard Drives
TOSHIBA MK5076GSX
Antivirus
AVG FREE
It may be caused by vibrations caused when actually turning off the light
Click to expand...
:-) Nice idea, but no, I turn it on and off at the plug, way away from the PC, where there is a little switch. It's just a desk lamp, with a common or garden light bulb (i.e. filament)... nothing special.

Does the UPS has a USB cable connected to the computer
Click to expand...
Yes (a likely culprit?)

Are the UPS battery's still holding energy?
Click to expand...
Yes.

Thanks
 

My Computer My Computer

At a glance

Windows 7 Home Premium SP1 64-bitIntel Core i7-4790K CPU @ 4.5GHz16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz8GB NVIDIA GEFORCE GTX 1070
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Home Premium SP1 64-bit
CPU
Intel Core i7-4790K CPU @ 4.5GHz
Motherboard
Asus H97I-PLUS
Memory
16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz
Graphics Card(s)
8GB NVIDIA GEFORCE GTX 1070
Monitor(s) Displays
HannsG 28" & Dell 24"
Screen Resolution
1920x1200
Hard Drives
1 x 2TB Samsung Evo 860 SSD
2 x 500GB Samsung Evo 850 SSD
PSU
CORSAIR 650W CS SERIES
Case
Thermaltake Core V1 Mini ITX Cube
Cooling
NOCTUA NH-L12
Browser
Firefox
Other Info
Custom PC used for X-Plane 11
When you turn of a device, it generates a spark on the switch that generates radio frequences.
- Cover your mouse with a aluminium paper (to block RF)
- Try to detach the UPS USB cable.
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 7 HP 64i5 6600K - 800MHz to 4200MHz4+4G GSkill DDR4 3000IG - Intel 530
    Computer type
    PC/Desktop
    Computer Manufacturer/Model Number
    custom build
    OS
    Windows 7 HP 64
    CPU
    i5 6600K - 800MHz to 4200MHz
    Motherboard
    GA-Z170-HD3P
    Memory
    4+4G GSkill DDR4 3000
    Graphics Card(s)
    IG - Intel 530
    Monitor(s) Displays
    Samsung 226BW
    Screen Resolution
    1680x1050
    Hard Drives
    (1) -1 SM951 – 128GB M.2 AHCI PCIe SSD drive for Windows 7 and Lubuntu
    (2) -1 WD SATA 3 - 1T for Data
    (3) -1 WD SATA 3 - 1T for backup
    PSU
    Thermaltake 450W TR2 gold
    Keyboard
    Old and good Chicony mechanical keyboard
    Mouse
    Logitech mX performance - 9 buttons (had to disable some)
    Internet Speed
    500Mb/s
    Browser
    Firefox 64
    Other Info
    TinyWall firewall

  • At a glance

    Windows 7 Proi7-4500U 800MHz to 3.0GHz(4+4)G DDR3 1600IG intel 4400 + NVIDIA GeForce GT 745M
    Computer type
    Laptop
    System Manufacturer/Model Number
    Asus Q550LF
    OS
    Windows 7 Pro
    CPU
    i7-4500U 800MHz to 3.0GHz
    Motherboard
    Asus Q550LF
    Memory
    (4+4)G DDR3 1600
    Graphics Card(s)
    IG intel 4400 + NVIDIA GeForce GT 745M
    Sound Card
    Realtek
    Monitor(s) Displays
    LG Display LP156WF4-SPH1
    Screen Resolution
    1920 x 1080
    Hard Drives
    BX500 120G SSD for Windows and programs +
    1T HDD for data
    Internet Speed
    500 Mb/s
    Browser
    Firefox
    Other Info
    TinyWall firewall
I had a similar problem once..It was a bad battery in my UPS
 

My Computer My Computer

At a glance

Windows 7 64 bit
OS
Windows 7 64 bit
The battery shows as good on the display... well, it's no big deal. I just make sure I turn the light on or off before I put the PC into standby...
 

My Computer My Computer

At a glance

Windows 7 Home Premium SP1 64-bitIntel Core i7-4790K CPU @ 4.5GHz16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz8GB NVIDIA GEFORCE GTX 1070
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Home Premium SP1 64-bit
CPU
Intel Core i7-4790K CPU @ 4.5GHz
Motherboard
Asus H97I-PLUS
Memory
16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz
Graphics Card(s)
8GB NVIDIA GEFORCE GTX 1070
Monitor(s) Displays
HannsG 28" & Dell 24"
Screen Resolution
1920x1200
Hard Drives
1 x 2TB Samsung Evo 860 SSD
2 x 500GB Samsung Evo 850 SSD
PSU
CORSAIR 650W CS SERIES
Case
Thermaltake Core V1 Mini ITX Cube
Cooling
NOCTUA NH-L12
Browser
Firefox
Other Info
Custom PC used for X-Plane 11
If you can, lower the sensitivity on the UPS..If you have an APC brand you can do it on them..I have mine set on low..

Try also plugging the lamp into a surge outlet and not a backup outlet..
 

My Computer My Computer

At a glance

Windows 7 64 bit
OS
Windows 7 64 bit
OK, will look, Thanks for the information,
 

My Computer My Computer

At a glance

Windows 7 Home Premium SP1 64-bitIntel Core i7-4790K CPU @ 4.5GHz16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz8GB NVIDIA GEFORCE GTX 1070
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Home Premium SP1 64-bit
CPU
Intel Core i7-4790K CPU @ 4.5GHz
Motherboard
Asus H97I-PLUS
Memory
16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz
Graphics Card(s)
8GB NVIDIA GEFORCE GTX 1070
Monitor(s) Displays
HannsG 28" & Dell 24"
Screen Resolution
1920x1200
Hard Drives
1 x 2TB Samsung Evo 860 SSD
2 x 500GB Samsung Evo 850 SSD
PSU
CORSAIR 650W CS SERIES
Case
Thermaltake Core V1 Mini ITX Cube
Cooling
NOCTUA NH-L12
Browser
Firefox
Other Info
Custom PC used for X-Plane 11
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