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post #41 of 54
Quote:
Originally Posted by VaiFanatic View Post

It randomly boots on its own after having been shut down for a good while.

Call ghost busters? Honestly, you might need to hit Shrak, Plan9, Transhour, or some of the others on that one because that is definitely out of my league.
     
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CoolingOSOSMonitor
Fanless Win10 Home x64 Kubuntu 16.04 (requires Linux kernel 4.5/4.6) 13.3 inch 16:9, 1920x1080 pixel, AU Optronics A... 
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post #42 of 54
Creepy! Sorry to say, its beyond me as well.
post #43 of 54
Can honestly say I haven't seen a phantom laptop before.



Edit: Some sources are pointing towards faulty RAM. Some others point towards a kernel bug from a year or so ago that has or at least should be patched.
Edited by Shrak - 8/17/12 at 9:56pm
post #44 of 54
Thread Starter 
Quote:
Originally Posted by Rookie1337 View Post

Call ghost busters? Honestly, you might need to hit Shrak, Plan9, Transhour, or some of the others on that one because that is definitely out of my league.

Lol, I've never seen that in my life either, on anything. And I've built over 100 computers myself and never seen something like this.

Quote:
Originally Posted by jrl1357 View Post

Creepy! Sorry to say, its beyond me as well.

It is very creepy when I hear the laptop boot up and the lights begin flashing, with the lid closed no less!! So nothing is touching the power button!

Quote:
Originally Posted by Shrak View Post

Can honestly say I haven't seen a phantom laptop before.
Edit: Some sources are pointing towards faulty RAM. Some others point towards a kernel bug from a year or so ago that has or at least should be patched.

It ran perfectly before installing Linux, so I know it's not the RAM, and none of the other computers I've installed Mint on (that number is up to 8, I have many, many laptops around) 2 of which are identical to the Phantom PC and 6 of which are a mixed of Asus, Toshiba, Samsung, and Gateway.

I am baffled!
post #45 of 54
sorry to ask such a dumb question, but are you definitely shutting the machine down or suspending / hibernating it?

Next time it powers up, in the terminal type: "poweroff" - this will shut it down properly. And then see if the same thing happens.


The only other thing that springs to mind is Wake On LAN - but that would be OS independent (as should all the BIOS stages that happen upon machine power up) and I'd have thought you'd known if that was happening laugher.gif

Definitely an odd one this.
Edited by Plan9 - 8/18/12 at 1:34am
post #46 of 54
Thread Starter 
Quote:
Originally Posted by Plan9 View Post

sorry to ask such a dumb question, but are you definitely shutting the machine down or suspending / hibernating it?
Next time it powers up, in the terminal type: "poweroff" - this will shut it down properly.
The only other thing that springs to mind is Wake On LAN - but that would be OS independent (as should all the BIOS stages that happen upon machine power up).
Definitely an odd one this.

I'm sure it's shutting down. I've even used the terminal command as you've suggested to test it, and it randomly sprung to life.
post #47 of 54
Quote:
Originally Posted by VaiFanatic View Post

I'm sure it's shutting down. I've even used the terminal command as you've suggested to test it, and it randomly sprung to life.


Is the BIOS version the same as the other laptops of the same spec? Have you tried flashing the BIOS? There might be a bug in your BIOSs ACPI which would mean Linux isn't properly powering off the machine even when it appears to be (and thus even from the poweroff command)

A test of this might be to take the battery and power out after you've shut Linux down, wait a few seconds then plug it back in. This will obviously force the laptop to power off.

Then if it powers on again, do the same thing but make sure that you don't have an ethernet cable nor mains power cable plugged in - just to make sure it's not any outside influences. If it still powers on again, then there's some dodgy hardware or maybe a weird BIOS setting at play.

Also, have you checked the BIOS battery isn't flat (I'm assuming laptops have a BIOS battery)? I can't think why that might cause phantom starts - maybe because the system hasn't detected it's flat, the timer resets and some kind of scheduler wake up gets called. But I'm clutching at straws here laugher.gif
post #48 of 54
Thread Starter 
Quote:
Originally Posted by Plan9 View Post

Is the BIOS version the same as the other laptops of the same spec? Have you tried flashing the BIOS? There might be a bug in your BIOSs ACPI which would mean Linux isn't properly powering off the machine even when it appears to be (and thus even from the poweroff command)
A test of this might be to take the battery and power out after you've shut Linux down, wait a few seconds then plug it back in. This will obviously force the laptop to power off.
Then if it powers on again, do the same thing but make sure that you don't have an ethernet cable nor mains power cable plugged in - just to make sure it's not any outside influences. If it still powers on again, then there's some dodgy hardware or maybe a weird BIOS setting at play.
Also, have you checked the BIOS battery isn't flat (I'm assuming laptops have a BIOS battery)? I can't think why that might cause phantom starts - maybe because the system hasn't detected it's flat, the timer resets and some kind of scheduler wake up gets called. But I'm clutching at straws here laugher.gif

The laptop is about two years old, purchased with 3 others of the same type that have no BIOS or CMOS battery issues.

I've taken the laptop battery out and left it plugged it to the wall outlet and it'll do it, and I've left the battery in and disconnected it from the wall and it'll do it.

I think it's just trying to come alive ohno-smiley02.gif

Like I said, I have been using this laptop with 7 Pro for months now with no phantom behavior.

It's not big deal, it was just something I had to share!
post #49 of 54
Quote:
Originally Posted by VaiFanatic View Post

The laptop is about two years old, purchased with 3 others of the same type that have no BIOS or CMOS battery issues.
I've taken the laptop battery out and left it plugged it to the wall outlet and it'll do it, and I've left the battery in and disconnected it from the wall and it'll do it.
I think it's just trying to come alive ohno-smiley02.gif
Like I said, I have been using this laptop with 7 Pro for months now with no phantom behavior.
It's not big deal, it was just something I had to share!

Dodgy ACPI firmware could still show itself differently in different OSs. The problem is -IIRC- Microsoft co-developed ACPI with a couple of OEMs and they never disclosed the full spec. So Linux has to reverse engineer the interface and that means if the firmware has a bug / doesn't play nice, it's more likely to show itself in Linux than in Windows.

For this to show itself though, Linux (the kernel) would have to still be sat in memory when "powered off"; and as RAM is volatile, this means Linux must have powered down all the interfaces (eg parked the HDD, et al) but not fully powered down the machine. This would give the illusion that the machine was off and phantom starting.

You did say you'd taken the battery out and left it with the mains power in, did you have a period (say 10 seconds) where both the battery and the mains power were disconnected? If so, then basically you've just wasted a few seconds of your life reading all of the above redface.gif

[edit]

Oh, and it's entirely possible that you can have a dodgy CMOS battery on one laptop and not the others. Or have a dodgy firmware version on one laptop and not the others (if a new firmware was released around the same time the laptops were manufactured and/or they came from different batches - despite being bought at the same time)
Edited by Plan9 - 8/18/12 at 1:56am
post #50 of 54
Thread Starter 
Quote:
Originally Posted by Plan9 View Post

Dodgy ACPI firmware could still show itself differently in different OSs. The problem is -IIRC- Microsoft co-developed ACPI with a couple of OEMs and they never disclosed the full spec. So Linux has to reverse engineer the interface and that means if the firmware has a bug / doesn't play nice, it's more likely to show itself in Linux than in Windows.
For this to show itself though, Linux (the kernel) would have to still be sat in memory when "powered off"; and as RAM is volatile, this means Linux must have powered down all the interfaces (eg parked the HDD, et al) but not fully powered down the machine. This would give the illusion that the machine was off and phantom starting.
You did say you'd taken the battery out and left it with the mains power in, did you have a period (say 10 seconds) where both the battery and the mains power were disconnected? If so, then basically you've just wasted a few seconds of your life reading all of the above redface.gif
[edit]
Oh, and it's entirely possible that you can have a dodgy CMOS battery on one laptop and not the others. Or have a dodgy firmware version on one laptop and not the others (if a new firmware was released around the same time the laptops were manufactured and/or they came from different batches - despite being bought at the same time)

Well, the four laptops are consecutively serial numbered (ordered from the manufacturer via business account).

I just tested the CMOS battery voltage with my multimeter and it checks out. It actually hasn't happened at all today, so maybe it was just some freak thing, haha.
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