This area of the BIOS seems to be the most misunderstood. When these settings are not properly configured, the result can be systems that do not shut down correctly, or that enter or awaken from the Standby or Hibernate modes improperly.

Since Windows has built-in power management, you'll want to disable all power management in the BIOS. Otherwise, the two fight with each other, and neither works properly. Motherboard manufacturers don't assume that everyone is using Windows, so many of these settings exist for non-Windows users. If you enable this feature and experience problems with the standby mode, simply go back into the BIOS and disable it. The Blank Screen option simply blanks the screen - use this for monitors without either power-management or "green" features.

If your computer and monitor were built within the last four years, I recommend setting this to DPMS. HDD Down In Suspend : This feature determines whether the hard-disk drive is automatically shut down when the computer enters Suspend mode. While most power settings of this type are controlled within Windows, if you find the hard drive is not powering down when the computer enters Suspend mode - assuming your computer even allows Suspend and Hibernate modes - then enable this option.

Otherwise, the recommended setting is Disabled. This setting tells the computer what to do if the power button is held down for less than four seconds. The options are to power off the system or enter Suspend mode. This setting is up to you. Otherwise, I recommend you set it to Disabled. Modem : This setting tells the computer to turn itself on when a phone line plugged into its modem rings.

Once again, this is used for remote administration. For other environments - in other words, most users - I recommend you set this to Disabled.

Automatic Power Up : This feature, if enabled, lets you designate a specific time each day when the PC will turn itself on.

Advanced Configuration and Power Interface

If that's useful to you, set it to Enabled. Otherwise, I recommend Disabled. The Automatic Power Up field must be enabled to use this feature. Disabled leaves the system off, while Enabled reboots the system.

BIOS Tuning Guide (Page 11)

Previous State sets the system back to the state it was in before the power interruption. I recommend you set this to Disabled. Disabled is recommended, so you don't accidentally keep turning on your computer. Disabled is recommended, as most people find this of an annoyance when they accidentally press the wrong key. Current page: Power Management Settings. See all comments 3. Not sure I'll find THG detailing how a user can change the boot drive to a plugnplay usb optical drive, so if needed, I can use my recovery disk to boot because I junked my laptop's onboard optical drive and am using a high end Windows compatable optical drive now and the Bios is still set to boot from it.

But I'll keep drilling. I was wondering if you could help me. I loved your well described article. You are the first person I have seen online to acknowledge that the power management contained in the software does not mesh well with the hardware. I want to try switching it to S1 mode. I have Windows 7 and it will not wake up.

What is ACPI? (AKIO TV)

Problem is I can't find the power settings in my bios. I have a dv and not sure what button to push when I turn the laptop on. If anyone could help me out it would much appreciated.Parameter group affecting various corrections of ACPI tables. This is a rather complex topic.

Often vendors are too lazy to write proper tables and internal devices may not be listed or CPU definitions are missing completely. These two parameters serve a very important purpose: to fix restart. These values theoretically should be in the FADT table, but it is not always the case.

acpi suspend type

Furthermore, FADT may be shorter than required and not contain them at all. This is the default value for real Macs but does not always work on a hackintosh. The difference is clear: a hackintosh additionally has a PS2 controller, which may prevent rebooting, if not disabled.

If not present, the default values states above will be used instead. It is, for example, possible to fake a mobile MacMini.

Value 3 will be chosen if this parameter is enabled. Enabling this parameter will cause Clover to automatically correct this table. If the table already is complete, then nothing will be changed. Following options are available:. To calculate the mask you can use the Calculator app, switch into Programmer view and turn on the hexadecimal numbering system.

Switch bits 0 to 15 to generate the required mask. Alternatively you can use the mask calculator by cVaD. This parameter represents a whole set of DSDT patches which can be activated individually. Since rev the DSDT fix mask has been extended to 32 bit.

If this bit is not set then the old mask will work as before. Insert temporarily USB keyboard 2. Assign F1 to Reduce brightness and F2 to Increase. No other combinations! After removing the USB keyboard assigning will continue working. It has another structure, another logic, and another results then we need. So this key is proposed which will convert this device to ADR, 0 and reused for injection. FakeID for example. Default is false. There is no need to comment them as everything will work either way.

Experiment by yourself. Besides, Clover already has obtained the processor type and core count. This parameter might be used to reduce heat in mobile systems. They will be discussed later. Other CPUs may need other values.

This value has a reversed effect on a Core2Quad for instance. The optimal value is 1 in this case.It's that time again, another long and drawn out post from Hat that'll vanish without trace within a day or two. I bookmark them myself and use them for my own reference.

But I do like sharing. ACPI system level references are seven power states that a device can be in. We commonly refer to them as S0 through S6. If the system is in a lower power state than a device can support, the device is turned off. Simple SCIs such as "Power button" are handled directly.

S0 The system is turned on. RAM is being read from, written to or refreshed. Hard disks are on. The CPU is not executing and is not ready to execute instructions, although registers and caches are maintained. Devices signalling support for S1 are in the on state, devices without support for S1 are in the off state. RAM is idle, but refreshed. PSU state is on. Hard disks are off in this state and all states deeper. S2 "Standby" Confusing "common" names. S2 is quite logically an intermediate between S1 and S3.

RAM refreshes normally. The CPU is in state much like S3. In fact, this is pretty much S3 but with a faster RAM refresh. S2 is in the spec, but not usually implemented. The CPU is not executing instructions, is not ready to execute instructions, does not maintain its registers and does not maintain cache. The OS must flush dirty pages from the cache when S3 is entered.

Devices able to support S3 and are enabled for resuming, may resume the system. External peripherals keyboard, mouse may or may not be able to resume the system, depending on what their host controller does. The contents of RAM are saved to disk and replaced on resume. The PSU is in the off state. Power may be mechanically removed without ill effect. The PSU is in off state.

acpi suspend type

CMOS is maintained by battery. This is not an "official" ACPI state, but is included in many motherboard manuals for some strange reason. This is the best I can dig up about it.Menu Menu. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced….

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Current visitors New profile posts Search profile posts Billboard Trophies. Question of the Week: What are some tricks to getting the best performance out of our home computers?

S1 POS vs. S3 STR. Sidebar Sidebar. Forums Software Windows XP. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Previous Next. HammerBot Distinguished. Jun 27, 1, 0 19, 1. What's the difference and how is it supposed to affect system standby, hibernation etc.

I tried the various setting and can't seem to spot any difference. The system runs Windows XP. Toejam31 Distinguished. Dec 31, 2, 0 20, 0. It's a bit more clear now.Log in or Sign up.

OCAU Forums. S1 or S3? On this setting, hibernate used to work without any problems.

acpi suspend type

On this setting, I am now displayed with the options of hibernating or suspend which wasn't previously there. However, this is where it all goes weird. When I hibernate, it doesn't work. Instead, it just locks the session and displays me with the password prompt to log back in. And when I suspend, it does what hibernate is meant to do. I am hoping somebody understands what I mean and can help clear up the issue.

Thanks in advance. Joined: Apr 20, Messages: 62, Location: brisbane. Joined: Oct 4, Messages: 1, Are you certain about that? Because I don't know for sure and you certainly sound like you do but could it equally be that S3 just appears like hibernate?

I mean, excepting the 'resuming from hibernation' message you get, and the time they take, S3 is pretty much identical to S Or is that S6? GlockFeb 28, The whole things weird. What the hell is S5 and S6? I only have the option of S1 and S3. S5 or S6, not sure which is actual hibernation, same thing as hibernate in windows, but it happens when you select suspend or hit the button on your case.

S1 is just the normal 'sleep' thing. GlockMar 1, I'm not sure. Anyways, ever since then I've had random freezes when booting into XP. Not sure what your issue is but interested if you find a solution, it may be the solution to my problem also. Maybe it's a bug with dual boot systems perhaps? Spot on - if you change from S1 to S3 in the BIOS, you need to do the following to make sure it all works properly: 1. Make sure that all of your USB jumpers are set to the 5V standby setting so they still provide some juice when the PC is sleeping - otherwise you cannot wake the PC with the keyboard or mouse, etc.

Reinstall Windows from scratch. The HAL has changed, and you absolutely, positively, need to do this. Found out the hard way when using MCE Post a Comment. I'm an Exp Sample Text. Search for:. When you quoted set the standby mode under window OS to S1 or S3" I think you were referring to changing the mode in the actual windows os.

I think that you have to have S3 set up in your bios first so that windows can accomplish this. Many bios that I have used come with S1 as the default setting.

I changed my bios to reflect S3 only. And make sure you let bios know you have an os that uses plug and play. Otherwise your bios sets up the devices in your system. This may impact on your using Windows to set up your S1 or S3 configuration. At any rate I always change my bios to S3 and I have had no problems.

I used to have a problem with my usb mouse kicking me out of standby but lately that hasn't been the case. I guess they fixed something.

ACPI Suspend Type. S1 or S3?

Email This BlogThis! Share to Twitter Share to Facebook. Popular Posts. This set contains 30 metal gradient swatches for Adobe Illustrator. File format Ai. You can download it for free and use the gradient swa Have you ever faced a situation where you need to change the product key of Microsoft office? Is uninstalling and reinstalling the o This software is usuallyVideo Off Method - This option allows you to select how your monitor will be turned off in power saving mode.

This is ideal for monitors without DPMS. Blank only writes blanks to the video buffer. For optimal performance, select DPMS. Video Off In Suspend - This option allows you to select whether or not you want your video card to operate in power saving mode. The default setting is "Yes". S1 or Stop Grant is power on suspend.

S3 is suspend to RAM. S4 is Hibernate suspend to HDD. No power is given to any component, but your current OS settings, etc. S5 is soft-off. No power is given to any system component, current configuration is not saved. This is best left as default unless you are experiencing problems.

Suspend Mode - This option enables you to select how long your system can be inactive before shutting down. This is a matter of personal preference, but I prefer it set to "Disabled". Again, this is a matter of personal preference, but I prefer it set to "Disabled". If you set it to "3", then you will have to hold the button for three seconds. If you set it to "Instant-Off", then your system will power down as soon as you press the button. Resume by Alarm - If this setting is enabled, you can select the exact time and date for when your system will power on.

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