BIOS

Power Management

ACPI - Advanced Configuration and Power Interface is a standard for computer hardware that allows the operating system
to discover and configure power management for hardware devices. There are three ACPI states that matter:

• S1: All processor caches are flushed, and the CPU(s) stop executing instructions. Power to the CPU(s) and RAM is maintained; devices that do not indicate they must remain on may be powered down.
• S2: The CPU is powered off (unsupported)
• S3: Commonly referred to as Standby, Sleep, or STR - Suspend to RAM. RAM is still powered.
• S4: Hibernate. All content of RAM is saved to the hard drive and the machine is entirely powered down. STD - suspend to disk

Often, you can configure in the BIOS if you want your computer to sleep using S1 or S3. S3 uses less power, but S1 is generally more compatible.

https://phoenixnap.de/Glossar/ACPI-erweiterte-Konfiguration-und-Stromversorgungsschnittstelle https://wiki.ubuntuusers.de/Archiv/Energiesparmodi_mit_ACPI/ https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/

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PC-Töne und was sie bedeuten

• A very short beep is indicative of a problem with your motherboard. It can also mean that you have a problem with your system memory (BIOS AWARD).
• A long beep followed by three sequential short beeps signals an issue linked to your graphics card configurations.
• A short beep followed by three sequential long beeps means that you have a problem with your system memory.
• If you are hearing beep, pause, beep, pause, followed by two sequential beeps, the error is linked to your CPU (central processing unit).
• Three beeps, pause, three beeps, pause, followed by four beeps indicates an issue with video memory.
• One long beep and nine short beeps means there is a problem with the ROM (BIOS AWARD).
• Three beeps, pause, four beeps, pause, followed by a beep signals an error with your graphics card.
• Four beeps, pause, three beeps, pause, and then one beep indicates a system memory problem.
• Five short beeps is another indication of issues with your CPU.
• Long, constant beeps alert system memory problems.

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