KVM in BIOS of Intel Pentium 4

[Sheravat]

I want to know about the Kernel based Virtual Machine(KVM) that is located BIOS. I am having the Intel Pentium 4 processor and many times I get the error of KVM. I am not able to do any R and D with that because I am not knowing much about the KVM. One of my friend told me that knowing the UI of KVM can help me know about the error. So please provide some information about the related things that are present in the KVM in Intel Pentium 4.

[Alchmey]

Management of energy appeared on the PC via Advanced Power Management system, which was actually managed by the BIOS and enabled a minimal interaction with the OS. A consortium comprising among others Intel, HP and Microsoft are putting in place to set the standard Advanced Configuration and Power Interface (ACPI), which standardizes the interaction between hardware and operating system issues on configuration and management consumption.

[Kane01]

ACPI works through descriptive tables (Differentiated System Description Table) who liaise between the calls of the OS and associated equipment. These tables are compiled using the compiler and stored in the ACPI BIOS, are written in a specific language called AML (ACPI Machine Language), which reads in part (here, for the description of different energy states of processor).

 Processor (
 \ _SB.CPU0, / / Processor Name
 One, / / ACPI Processor ID
 0x120,
 6)
 (Name (_CST, Package ()
  (3
  Package () (ResourceTemplate () (Register (FFixedHW, 0, 0, 0)), 1, 20, 1000),
  Package () (ResourceTemplate () (Register (SystemIO, 8, 0, 0x161)), 2, 40, 750),
  Package () (ResourceTemplate () (Register (SystemIO, 8, 0, 0x162)), 3, 60, 500)
 ))
 Name (_CSD, Package ()
 (Package () (6, 0, 0, 0xFD, 2, 1),
   Package () 6 (, 0, 0, 0xFD, 2, 2)
 )))

[Golfert]

The Microsoft compiler is tolerant to errors and supports deviance compared to official specifications, while the Intel implements them strictly. The latter can not deal with some tables manufacturers disrespectful, while MS will compile a table that will be buggy in the eyes of our favorite OS fond (at) standards strictly. This is the first cause which can train on your system, management of energy consumption is non-existent or ineffective. By having the necessary options enabled in the kernel (Power Management Support -> ACPI), the system should make entries in / proc / acpi such as battery, fan, thermal_zone, button ... and can detect events such as pressing the button "standby", connecting / disconnecting the power sector, the closure of a laptop ... He may know for example the CPU temperature, speed of rotation of fans, the level of battery charge ... It can help set the fan speed, power on / off the backlight ...

[Recko]

The management of processor power consumption is an area a little bit different, which depends cpufreq. If the options listed above are absent, and thus may indicate that ACPI called DSDT table is defective. However, the situation is not blocked. Let's see together how to ensure that the Linux kernel ACPI properly. The goal here will be to find a DSDT table already corrected to compile and to use the kernel instead of the BIOS.

[Rover]

Search engines are your most effective allies to find a corrected DSDT table for your configuration. It will take the form of a file .Asl. The corrected table is normally compile without error and two files are generated in the current directory with the name of the table starting with the extensions .Aml and .Hex. It remains to tell the kernel to use it consistently. We have the choice to be specified when configuring the kernel to the latest versions, or include it in the initrd. ACPI is an acronym for Advanced Configuration and Power Interface, Advanced Interface for configuration and management of energy. An ordinary co-developed by Microsoft, Toshiba, Intel, Phoenix Technologies and Hewlett Packard.

[PeterAGASSI]

Recompiling the kernel later, you can reboot to test the proper operation of the ACPI. Include a table in the initrd is slightly more complex. You need the kernel patch-acpi DSDT-initrd and add the file. Aml to the initrd / initramfs is almost specific to each distribution, but has the advantage of not requiring a kernel recompilation on the change table DSDT.

[Amd Athlon]

Side userland daemon acpid is responsible for collecting events via ACPI / proc / acpi / event and execute the scripts that you define as a reaction to which such event in the / etc / acpi / events /. At a higher level again, gathering all the means to retrieve information and act on system power (ACPI, lm_sensors, hdparm ...), are utilities like kpowersave or gnome-power-manager. All configurations are however not able to display all this information on ACPI, in which case (non-portable computers, for example), it is possible to question the i2c bus and its derivative SMBUS. This bus, very simple in its design and intended for small volume transfers to low-flow, is often present on our current configurations. The sensors-detect utility project lm_sensors will tell you if it detects such components, but this was outside the scope of this paper.

[Baltazar]

The i2c for Inter Integrated Circuit Bus was developed by Philips for electronics and home automation applications. The i2c bus is present everywhere, from your mobile phone to your computer through your TV. I2C is a trademark of Philips. Manufacturers of compatible components often use the term IPS instead of i2c.

[Sebastian.j]

Unix systems often use file system called "virtual" for different purposes. Faithful to the old principle that everything must be file, we find forms and devices entries in the hierarchy / dev directory. This concept has been extended to the representation of additional elements, such as the state system and its current tasks, via the famous / proc. Presenting information vary according to operating systems, it is provided in Linux and even exceeds the context of use that should have originally. Thus, our OS we present a small jumble of miscellaneous information, such as / proc / modules, / proc / fs / proc / cpuinfo ...