this post was submitted on 10 Sep 2024
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Greetings! So recently, i spent a few hours coding software. After i was done and i shut off my pc, i noticed both of the ethernet lights were on and blinking. Does this mean that Microsoft is sending data to their servers before the PC fully shuts off? I am scared that this might be the thing it does. How can i get rid of this issue? I have no idea if it's related to Windows or the PC itself.

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[–] [email protected] 11 points 1 month ago (2 children)

As other said, it's surely related to the LAN traffic and not the WAN traffic only your router sends some packets but it shouldn't be Windows. Little tips if you don't want telemetry and tracking, simply use Linux.

[–] [email protected] 3 points 1 month ago (2 children)

I dualboot both Windows and Linux. I use windows just for pyinstaller and compiling, while i daily drive Arch Linux with dwm.

[–] [email protected] 1 points 1 month ago (1 children)

Why windows for pyinstaller and compiling?

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago) (1 children)

Well as you may know, when you try running pyinstaller on linux, it packs the .py file into a linux exectuable, not a windows executable.

[–] [email protected] 1 points 1 month ago (1 children)

Very interesting! Thanks for the heads up. I didnt know that. 7 years ago, they already used wine for that. https://stackoverflow.com/questions/44014390/how-to-generate-a-windows-executable-using-pyinstaller-on-linux#45065125

If all else fails you could also use a vm. Thats probably less dangerous than dual booting because of windows not playing nice with grub.

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago)

I dualboot both Windows and Linux using the BIOS's boot menu. Linux installed on a seprate drive, windows on another.

[–] [email protected] 1 points 1 month ago
[–] [email protected] 6 points 1 month ago* (last edited 1 month ago) (3 children)

use Linux

Had to be said, didn't it?

[–] [email protected] 9 points 1 month ago

And always use proper protection when surfing online

[–] [email protected] 1 points 1 month ago

Right sorry

[–] [email protected] 1 points 1 month ago
[–] [email protected] 6 points 1 month ago* (last edited 1 month ago) (1 children)

Maybe but probably not. Its just frames coming in from the rest of the network. The device on the other end doesn't know the computer is off.

Alternatively if the card still has power it might be just in the state Windows left it in. I could imagine it would be good to not have to reinitialize the card all the time.

Why are you concerned about telemetry on shutdown? That wouldn't make any sense as it sends your data and checks the system status in the background while you use your computer. Also it is not great practice to totally shutdown at night as that's the time when update happen. It also could theoretically wear out hardware but chances are that's not a problem on newer machines

[–] [email protected] 5 points 1 month ago (1 children)

Also it is not great practice to totally shutdown at night as that's the time when update happen.

updates can be installed when it's turned on, though, and it well consume much less power.

It also could theoretically wear out hardware but chances are that's not a problem on newer machines

what do you mean? I don't understand.
if you mean the HDDs spinning down and up, then

  • if it only happens at shutdown, it shouldn't wear them out, additionally as I know HDDs (consumer models at least) don't like endless spinning either
  • windows probably shuts it down regularly when it's not in use. this is a setting in the power profile
  • as I know, frequent spindowns only increase wear out if it happens very often, like every 10 seconds and such because of the drive's garbage internal power saving setting. that's why I always keep it at least 30 minutes or more
[–] [email protected] 1 points 1 month ago (2 children)

I've never seen hardware die because of repeated shutdowns. Also most people aren't running HDDs these days as flash storage is cheap and plentiful.

For updates you need to be turned on for them to install. That's why shutting it down isn't good practice. Just set a maintenance window and put the computer to sleep.

[–] [email protected] 1 points 1 month ago

I've never seen hardware die because of repeated shutdowns

then why do you recommend to keep the computer on for a longer life?

but in the case of hard drives, this is a real thing, just not at that scale of shutdowns. if you don't find sources on this let me know and I'll show some.

For updates you need to be turned on for them to install. That's why shutting it down isn't good practice. Just set a maintenance window and put the computer to sleep.

of course, the installation will get prepared while the computer in on. it will have plenty of time being turned on.
but most updates, including a lot of security updates only apply when restarting the updated software, like shutting down the operating system.

[–] [email protected] 1 points 1 month ago

or just install and then shut down?

[–] [email protected] 1 points 1 month ago

I believe you can stop it by turning off a feature called "fast startup" or something like that.

[–] [email protected] 44 points 1 month ago

Your PC network card keeps the connection up in order to receive wake on LAN requests.

Any link activity whilst the PC is shutdown is packets that were broadcasted to the entire network. Other PCs, DHCP requests, etc send traffic to all devices on the network. So seeing some traffic whilst it's off is nothing to worry about.

[–] [email protected] 3 points 1 month ago

i noticed both of the ethernet lights were on and blinking

So usually one of the lights on the port indicates the link state (up/down and if its at full speed or a reduced speed) and the other light indicates data flow. Both lights blinking suggests either a really shoddy link state or an unusual implementation of status lights on the port. Do both lights blink while its booted and actively transferring a large file? Can you find documentation of how your device implements the indicator LEDs? (I can't tell if that's a dongle or a port on your computer)

[–] [email protected] -3 points 1 month ago

disconnect ur pc from power physically if the behavior continues which i would guess it will its probably something connected to ur wifi doing something in a dumb way if it stops thats wierd as fuck but forcing the pc to shut down by holding the power button should do the trick since that usually tells the motherboard to tell the power supply to shut off and i dont think windows gets a say on that.

[–] [email protected] 25 points 1 month ago (2 children)

You computer has a feature for Out of Band management. Either WoL as others have mentioned or vPro(Intel), iLon(HP), iDrac(Dell), as well a few other less popular systems depending on who makes your mainboard or NIC.

This leaves the power on to the network card so that it can be used even with your computer off. It does not have access to your normal computer in the this case. Just the ability to turn on/off the system and sometimes options to update BIOS/UEFI firmware and send a console image to either a client or browser.

The lights are blinking because broadcasts packets from other devices on your LAN are sent to every device. This is normal and expected behavior.

[–] [email protected] 1 points 1 month ago

More rarely: some poorly configured USB controllers can actually provide enough backwash power to the motherboard that some LEDs still blink, like the Ethernet indicators.

I ran into this myself, I notice the lights being on, and they stayed on when I unplugged the computer. Took me a good 5m of debugging to figure it out.

[–] [email protected] 5 points 1 month ago

The lights are blinking because broadcasts packets from other devices on your LAN are sent to every device. This is normal and expected behavior.

Just building off of this, modern computers are chatty as heck and there's just constantly little bits of chatter spamming out on LANs. This is normal and expected behavior

[–] [email protected] 5 points 1 month ago
[–] [email protected] 1 points 1 month ago

I'm sure it's legacy thing from back in the day, flashing means it's sending or receiving, solid means it's idle.

[–] [email protected] 7 points 1 month ago