Hi,
Does anyone know why the following code returns the correct days uptime in XP, but doesn't in Windows 8? (not tested in anything other) Also, is it close to working correctly in Linux as well?

Thanks in advance

Richard

function TfrmMain.GetDaysUptime: integer;
var
   TickCount: variant;
   mySeconds: variant;
   dys,hrs,min,sec : variant;
begin
  TickCount := LclIntf.GetTickCount;
  mySeconds := TickCount Div 1000;
  hrs := (mySeconds Div 60) Div 60;
  mySeconds := mySeconds - (hrs * 60 * 60);
  min := mySeconds Div 60;
  mySeconds := mySeconds - (min * 60);
  sec := mySeconds;
  if hrs >= 24 then
    dys := hrs Div 24
  else
    dys := 0;

   Result := dys;

end;
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"Richard Mace" wrote

Hi, Does anyone know why the following code returns the correct days uptime

in XP, but doesn't in Windows 8? (not tested in anything other)

Just in case: you know that Windows 8 does not really shutdown by default, but merely suspends to provide a faster "user experience"? So the result returned by GetTickCount will not be what you might expect. Also on Unix systems it won't work as GetTickCount is linked up with a date/time based function there.

Regards,
Sven
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Richard Mace wrote

Does anyone know why the following code returns the correct days uptime in XP, but doesn't in Windows 8? (not tested in anything other)

I happened to read this :
http://www.extremetech.com/computing/164209-windows-8-banned-by-worlds-top-benchmarking-and-overclocking-site

although I guess you are not overclocking.

Juha

Ah, that's interesting.
Even if you actually choose Shutdown from the menu? Richard

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"Richard Mace" wrote

Ah, that's interesting. Even if you actually choose Shutdown from the menu?

Especially then. AFAIK a reboot triggers a full shutdown (with restart of course) and there might also be another possibility for a clean shutdown, but I don't remember that...

Regards,
Sven
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Interesting. I was sure that it was fully shutting down. I'll test the code after a fresh reboot
Richard

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Hi Sven,
I'm amazed! Sure enough, if I choose "restart" the uptime reads 0 days, and yet, shutdown doesn't actually shut it down!
Crazy!
Richard

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Richard Mace wrote

Hi Sven, I'm amazed! Sure enough, if I choose "restart" the uptime reads 0 days, and yet, shutdown doesn't actually shut it down!

Yes, Windows only shuts down the user session till only the bare core of the OS is remaining and then goes to hibernate. This allows for a much faster resume than full shutdown. So they say... ;)

Here is a link which explains how to achieve a full shut down: http://www.howtohaven.com/system/how-to-shutdown-windows-8.shtml (after the section title "How to Really Shut Down Windows 8")

Regards,
Sven

This is offtopic now, not related to lazarus, but better be aware. That behavior of Win8 caused data loss for me.
Once I needed to copy hundreds of GB-s, so removed the HDD from a win8 machine after thinking it has shut down.
Placing that HDD in my Win7 desktop and right after start it ran chkdsk, because it detected something broken because of an unclean shutdown. I could skip this chkdsk if I knew about, but after switching on the win7 machine my attention was at a different point. Just noticed the running chkdsk when it almost finished. Most of the file were gone...
Thanks God, testdisk was able to restore most of the lost files, but not all.

Thanks for reading.

Regards
Laszlo Kovacs

------ Az eredeti ?zenet ------
Felad?: "Sven Barth"
C?mzett:
Elk?ld?tt elemek: 2014.08.06. 22:14:10
T?rgy Re: [Lazarus] Obtaining uptime

Sven Barth wrote

Just in case: you know that Windows 8 does not really shutdown by default, but merely suspends to provide a faster "user experience"?

(Off Topic: )

Are they crazy ?

If you have an SSD, again and again rewriting the huge hibernation file will kill the device.

So if there is no user-friendly option to deselect this queer option the users should be bashing them ....

-Michael

default, but merely suspends to provide a faster "user experience"?

will kill the device.

Did you read what I wrote later on? The system shuts down most of the system and thus only needs to save the core OS (which is much smaller) and not the whole RAM.

Regards,
Sven
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2014-08-07 10:22 GMT+02:00 Michael Schnell :

I thought that SSD lifespan was more influenced by the number of writes at the same place than by the volume of writes. I mean : if you overwrite the same file each second the SSD would fail in less time than if you wrote a different file in a different place each second. But I could be wrong.

Frederic Da Vitoria wrote

2014-08-07 10:22 GMT+02:00 Michael Schnell < <mailto:>>:

Could you guys perhaps move this off topic discussion to another list?

Yes, go to power options -> what buttons do and turn off "fast startup".

This is also needed if you have older drivers, since not all support this (usually the same as the ones that don't support hibernation).

At work we thus turn it off by default.

That's the whole idea to not do that. Only when the system changes the image is redone. Keep in mind it doesn't save the current state (since you are shutting down), so only the last boot state is saved, usually the one from last patch tuesday.

(that being said, I use hibernation on SSD devices without much problems. Usually they are specified as writing the whole space several times a day)

Wow.

Don't get me wrong. It is generally a good feature, but not for everything, and keep in mind that "industrial" equipment is often a positive sounding synonym for "old".