Power management
In Windows Vista, a Sleep power state replaces Standby mode and is active by default. When chosen, this new "Sleep" mode saves information from the computer's memory to the hibernation file on disk, but instead of turning off the computer, it simultaneously enters Standby mode. After the specified amount of time, it shuts down (hibernates). If power is lost during Standby mode, the system resumes from the existing hibernate image on disk. Sleep mode, thus, offers the benefits of fast suspend and resume when in Standby mode and relatively faster resuming and reliability when resuming from hibernation instead of a complete reboot, in case of power loss.
Also, in earlier Windows versions, drivers sometimes prevented Windows from entering or reliably resuming from a power-saving state. This problem has been solved in Windows Vista. Applications can disable sleep idle timers when needed such as when burning discs or recording media. Away mode, which is not a power plan by itself but a feature, automatically turns off displays, video rendering and sound but keeps the computer working when the user is away from the computer. Optionally, it can also switch to sleep mode. Advanced power settings can be configured using the Control Panel. Power settings are also configurable through Group Policy.
The battery icon in the notification area has been improved to let the user more easily select a "Power plan". "Presentation Settings", through the Transient Multimon Manager (TMM), allow saving of display preferences when an external display such as a projector or external monitor is connected. The setting can be restored when the same device is re-connected later. Presentation settings are available only on mobile computers.
No comments:
Post a Comment