Computer won't sleep completely

Discussion in 'PC Hardware' started by Alan Ladd, Nov 16, 2006.

  1. Alan Ladd

    Alan Ladd Guest

    Hello all. I just recently built a computer for the first time. It is
    awesome and everything is running as expected except for one thing. When
    I put the computer in sleep mode(Standby), the cpu cooling fan does not
    stop spinning. The same goes for the 120mm fan that I attached to the
    back of the case. In my old computer, an emachine T1840, when I put the
    computer on standby, everything shuts off except for the power button
    light changing from green to yellow. The fan was not spinning or at
    least I don't think it was because I never heard a sound from it when it
    was on standby. I have very sensitive hearing and I could sleep with the
    computer on standby without hearing a peep out of it.

    The specs on my new computer are as follows:

    Biostar P4M800M7A Socket 775 Motherboard

    Intel Pentium D 840 3.2gGHz DT 800FSB Socket 775

    Ultra 500w V-Series PSU Black

    Masscool 8W0141B Socket 775 CPU Cooling

    120 mm fan (can't remember the brand)

    I am running Windows XP Pro. My old machine had Windows XP Home. Could
    that be the difference? Is it something in the BIOS that I need to
    change or do I just need to bear with the noise until I can afford to
    buy a better cpu fan that isn't as loud?

    Any help will be appreciated.

    Alan Ladd, Nov 16, 2006
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  2. Alan Ladd

    Paul Guest

    For diagnostics, look for "dumppo.exe" in Google. It is a very small
    DOS utility, for returning info about ACPI states. Dumppo can
    be used, via its "administrative override" option, to change the
    level of ACPI states supported.

    ACPI power states are numbered S1 through S5. In S1, the monitor
    is blanked, but all the fans still spin. That is the state you are
    entering when you select standby.

    The S3 state is called "Suspend to RAM". Basically, all regular power
    goes off. That is the state your old Emachine was using. Only a
    little standby juice is flowing.

    S4 is Hibernate, which is "Suspend to Disk". That one has the
    advantage, that if the power goes off, you can recover your
    previous session. With S3 STR, if the power goes off, the
    session is lost.

    Both S3 and S4, drop power consumption to the 10W-20W region. That
    is the amount of power still used by the +5VSB rail, to keep the
    memory refreshed, and the LAN chip ready for a wakeup packet.

    Steps for standby:

    1) Set BIOS option properly. I'm not sure of the exact
    right setting in every case, but if it mentions S3,
    that might help.

    2) Install Windows with an ACPI HAL. You can check Device Manager
    and see the properties of "Computer", to see if it has been
    done correctly. If ACPI was disabled in the BIOS somehow (I've
    had some bad BIOS releases that do that), then your OS install
    is really screwed. If it says "Standard PC", then there is no
    ACPI installed.

    3) Use "dumppo.exe". Check the current capabilities with the "cap"
    option. If S3 is not there, use the administrative override, to
    define S3 as a valid state.

    Google should have a few entries for dumppo.

    Paul, Nov 16, 2006
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  3. Alan Ladd

    Chris Hill Guest

    Look in cmos power management, change sleep mode to s3 instead of s1.
    That should stop the fans. Hopefully it'll come out of standby okay,
    mine won't and I'm afraid I might have to reinstall windows to make it
    all owrk right.
    Chris Hill, Nov 16, 2006
  4. Alan Ladd

    Alan Ladd Guest

    Thanks so much for your quick and thorough response. I'm still a
    beginner when it comes to computers and your step by step instructions
    really helps. I will give this a try when I get off work later. Thanks
    again for the help.

    Alan Ladd, Nov 16, 2006
  5. Alan Ladd

    Alan Ladd Guest

    Thank you for your response. It's really amazing how you guys know so much
    about computers. I've been lurking here for a while and it never cease to
    amaze me with the level of expertise shown in this ng.

    Thanks again.

    Alan Ladd, Nov 16, 2006
  6. Alan Ladd

    OSbandito Guest

    If the processor is running hot, the fans will keep running. What temp?
    The big fan on the case has to be pushing air in the right direction;
    you don't want it to be fighting the fan. Check your Biostar
    WarpSpeed and WatchDog settings and readings re: fans, temps and
    voltages. Finally, a related device-driver issue:
    OSbandito, Nov 17, 2006
  7. Alan Ladd

    Alan Ladd Guest

    I checked every part of my BIOS and don't see any mention of S3 or Suspend
    to Ram for that matter. I checked the CMOS settings, Power Management and a
    couple others and saw no sign of enabling S3. That's a bad sign isn't it.

    Mine says ACPI Multiprocessor PC
    Okay. Downloaded dumppo.exe. Scanned it to make sure it's virus free.
    Double clicked it and something flashed briefly and nothing else happens. I
    did a little bit more googling to see how to use dumppo but all
    instructions I saw was a lot like your instructions. Override S1, change to
    S3, enable Suspend to RAM, etc. I'm afraid I just don't understand how I'm
    supposed to do any of those using dumppo. Am I supposed to open the file
    dumppo? Double click it? Run it under some setting? Is it a registry
    editing type thing? Any further help would be appreciated.

    Alan Ladd, Nov 17, 2006
  8. Alan Ladd

    Paul Guest

    Paul, Nov 20, 2006
  9. Alan Ladd

    Paul Guest

    Alan Ladd wrote:
    The vital ingredient - the "dumppo" program is a DOS program. You need
    to open a DOS window. On Win2K main menu, under Accessories, the DOS window
    is called "Command Prompt". When Command Prompt is run, you'll see a black window
    with C:\> and that is where you type the commands. Move the dumppo.exe
    program to the top level of the C drive, so you don't have to learn about
    "Change Directory" or cd. When done with the DOS window, you can close it
    by using the "exit" command, or click the usual "X" in the corner.

    Paul, Nov 20, 2006
  10. Alan Ladd

    Alan Ladd Guest

    Thanks so much. I managed to run dumppo. Through CAP I found out what
    Systems states supported which is S1 S4 S5. Then typed dumppo admin /ac
    minsleep=S3. That seems to have done it.

    Thanks again everybody. I hope someday I can be of help to others as much
    as you've helped me.

    Alan Ladd, Nov 20, 2006
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