If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Computer exits sleep mode during static discharge
Okay, it's winter time here, relative humidity is low, so there's a lot
of static build-up on your clothes. Now, I've noticed that during those static discharges, I can hear the computer immediately exits sleep mode. Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Yousuf Khan |
#2
|
|||
|
|||
Computer exits sleep mode during static discharge
On Sun, 30 Nov 2014 19:47:23 -0500, Yousuf Khan
wrote: Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Doubt it. Combination of predominately Windows' software and some interaction given leeway for slight changes hardware manifests over deviance from any sot of exacting precision programming them may, more or less, expect. I'd expect we'd be programming them for sunspots as well as grounding were it otherwise. You've a mouse/keyboard "human device," some contingency within related hibernation devices that's physically changed, faulting or out of specs, since initially installed properly, if not a greater likelihood for software migrating away from that original definition. Ghosts in the Shell. Binary backups. A reinstall of Windows. Various ways to interpret its humaneness, I suppose. |
#3
|
|||
|
|||
Computer exits sleep mode during static discharge
Yousuf Khan wrote:
Okay, it's winter time here, relative humidity is low, so there's a lot of static build-up on your clothes. Now, I've noticed that during those static discharges, I can hear the computer immediately exits sleep mode. Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Yousuf Khan Go to Device Manager and check the NIC properties. There can be multiple Wake On Lan items to select from. Make sure anything related to "carrier" is disabled, as a static discharge may cause enough of a "blurp" on the NIC wire, to trigger a rise from sleep. I would start by ensuring that *all* Wake On LAN is disabled. You can undo the setting later if you want. The second step would be to carefully examine all cables leaving the computer. Do you run a USB transfer cable, that runs from computer to computer ? That ends up connecting the grounds of the two computers together, which is only recommended if the computers are running off the same power strip. Try to ensure the I/O wiring isn't contributing to the problem. We had a problem like this at work, and the root cause in our case, was the reset wire inside the computer case, acted as an "antenna". It would cause the computer to reset, even during a static event 20 feet from the computer. Since your return from sleep, takes you back to Windows again, then it probably isn't a reset, but a Wake event instead. And I'm thinking the NIC is set to "wake on carrier change" or something similar. Paul |
#4
|
|||
|
|||
Computer exits sleep mode during static discharge
On 11/30/2014 6:47 PM, Yousuf Khan wrote:
Okay, it's winter time here, relative humidity is low, so there's a lot of static build-up on your clothes. Now, I've noticed that during those static discharges, I can hear the computer immediately exits sleep mode. Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Yousuf Khan If you have not already done so test the outlet and or outlet strip that is servicing the PC to verify that it is wired correctly as well as properly grounded. It would not be the first 3-prong replacement outlet that was stuck into an outlet box that was wired to only accept the ungrounded older 2-prong outlet. |
#5
|
|||
|
|||
Computer exits sleep mode during static discharge
On 30/11/2014 9:43 PM, Paul wrote:
Yousuf Khan wrote: Okay, it's winter time here, relative humidity is low, so there's a lot of static build-up on your clothes. Now, I've noticed that during those static discharges, I can hear the computer immediately exits sleep mode. Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Yousuf Khan Go to Device Manager and check the NIC properties. There can be multiple Wake On Lan items to select from. Make sure anything related to "carrier" is disabled, as a static discharge may cause enough of a "blurp" on the NIC wire, to trigger a rise from sleep. I would start by ensuring that *all* Wake On LAN is disabled. You can undo the setting later if you want. That does sound very plausible, but I do need to make use of the wake on lan feature here, so I'm not going to disable it. But it does give me a good theory explain it. It's not so much a problem as a curiosity. Yousuf Khan |
#6
|
|||
|
|||
Computer exits sleep mode during static discharge
On 30/11/2014 11:28 PM, GlowingBlueMist wrote:
If you have not already done so test the outlet and or outlet strip that is servicing the PC to verify that it is wired correctly as well as properly grounded. It would not be the first 3-prong replacement outlet that was stuck into an outlet box that was wired to only accept the ungrounded older 2-prong outlet. Another good theory to check into, this is possible. The building I live in was built back in 1976. Electrical wiring has hardly been changed since. Yousuf Khan |
#7
|
|||
|
|||
Computer exits sleep mode during static discharge
Yousuf Khan wrote:
On 30/11/2014 9:43 PM, Paul wrote: Yousuf Khan wrote: Okay, it's winter time here, relative humidity is low, so there's a lot of static build-up on your clothes. Now, I've noticed that during those static discharges, I can hear the computer immediately exits sleep mode. Even if the discharge didn't happen anywhere near the computer, it may have happened a room or two over, but you still hear the computer powering up. Is it possible that a discharge could come *up* through the grounding wires? Yousuf Khan Go to Device Manager and check the NIC properties. There can be multiple Wake On Lan items to select from. Make sure anything related to "carrier" is disabled, as a static discharge may cause enough of a "blurp" on the NIC wire, to trigger a rise from sleep. I would start by ensuring that *all* Wake On LAN is disabled. You can undo the setting later if you want. That does sound very plausible, but I do need to make use of the wake on lan feature here, so I'm not going to disable it. But it does give me a good theory explain it. It's not so much a problem as a curiosity. Yousuf Khan Yes, but WOL has as many as four "patterns". Wake on Carrier is the stupid one. Wake on specific pattern (the traditional WOL) will still work, without being triggered by static electricity. It's the Wake on Carrier change that causes the problem, because virtually anything can trigger it. And since Ethernet wiring "floats" and there is no DC ground present, there is a potential for the wiring to work as an antenna. Not an efficient antenna, but the potential is still there. I've placed a scope on Ethernet wiring, as part of my last job in the lab. And you can see tens of volts of potential (common mode) riding on an Ethernet cable. The transformer at the end of the line, removed the common mode stuff. The input looking at the other side of the transformer, should remove a little bit of common mode. It would be things like parasitic capacitance in the transformer, which might couple through the static discharge. And disabling the Wake on Carrier, and using some other pattern, will make the "key" to unlock sleep, that much more complicated. Paul |
#8
|
|||
|
|||
Computer exits sleep mode during static discharge
Yousuf Khan wrote:
On 30/11/2014 11:28 PM, GlowingBlueMist wrote: If you have not already done so test the outlet and or outlet strip that is servicing the PC to verify that it is wired correctly as well as properly grounded. It would not be the first 3-prong replacement outlet that was stuck into an outlet box that was wired to only accept the ungrounded older 2-prong outlet. Another good theory to check into, this is possible. The building I live in was built back in 1976. Electrical wiring has hardly been changed since. Yousuf Khan They make outlet testers. http://media.toolking.com/catalog/pr...let_Tester.jpg Those are crude devices, but they're also self contained and there are no wires to screw with. Such a device is good for detecting an open circuit on Safety Ground. Paul |
#9
|
|||
|
|||
Computer exits sleep mode during static discharge
On 01/12/2014 5:15 AM, Paul wrote:
Yousuf Khan wrote: That does sound very plausible, but I do need to make use of the wake on lan feature here, so I'm not going to disable it. But it does give me a good theory explain it. It's not so much a problem as a curiosity. Yes, but WOL has as many as four "patterns". Wake on Carrier is the stupid one. Wake on specific pattern (the traditional WOL) will still work, without being triggered by static electricity. It's the Wake on Carrier change that causes the problem, because virtually anything can trigger it. And since Ethernet wiring "floats" and there is no DC ground present, there is a potential for the wiring to work as an antenna. Not an efficient antenna, but the potential is still there. I've placed a scope on Ethernet wiring, as part of my last job in the lab. And you can see tens of volts of potential (common mode) riding on an Ethernet cable. The transformer at the end of the line, removed the common mode stuff. The input looking at the other side of the transformer, should remove a little bit of common mode. It would be things like parasitic capacitance in the transformer, which might couple through the static discharge. And disabling the Wake on Carrier, and using some other pattern, will make the "key" to unlock sleep, that much more complicated. Okay, I might test it out, you got me curious. And I do have one 10m (30ft) cable on this LAN, which might be the one acting as an antenna. Yousuf Khan |
#10
|
|||
|
|||
Computer exits sleep mode during static discharge
On 02/12/2014 4:14 AM, Yousuf Khan wrote:
On 01/12/2014 5:15 AM, Paul wrote: It's the Wake on Carrier change that causes the problem, because virtually anything can trigger it. And since Ethernet wiring "floats" and there is no DC ground present, there is a potential for the wiring to work as an antenna. Not an efficient antenna, but the potential is still there. Okay, I might test it out, you got me curious. And I do have one 10m (30ft) cable on this LAN, which might be the one acting as an antenna. Alright, I turned on the feature called "Only allow a magic packet to wake the computer". So far so good, seems to be keeping it from waking up with a static discharge. Yousuf Khan |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Keyboard won't wake computer from Sleep mode | Rebel1 | Homebuilt PC's | 7 | January 16th 14 03:15 AM |
New theory/story: Static discharge while connecting usb cable from digital camera. | Skybuck The Destroyer | Asus Motherboards | 7 | June 3rd 07 10:51 PM |
New theory/story: Static discharge from summer shoes while connecting new mouse. | Skybuck The Destroyer | Asus Motherboards | 13 | June 3rd 07 03:20 PM |
Sleep mode | Paul | Dell Computers | 5 | October 31st 03 12:55 AM |