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CONFIG_APM_DISPLAY_BLANK: Enable console blanking using APM

General informations

The Linux kernel configuration item CONFIG_APM_DISPLAY_BLANK has multiple definitions:

Enable console blanking using APM found in arch/i386/Kconfig

The configuration item CONFIG_APM_DISPLAY_BLANK:

Help text

Enable console blanking using the APM. Some laptops can use this to turn off the LCD backlight when the screen blanker of the Linux virtual console blanks the screen. Note that this is only used by the virtual console screen blanker, and won't turn off the backlight when using the X Window system. This also doesn't have anything to do with your VESA-compliant power-saving monitor. Further, this option doesn't work for all laptops -- it might not turn off your backlight at all, or it might print a lot of errors to the console, especially if you are using gpm.

Enable console blanking using APM found in arch/x86/Kconfig

The configuration item CONFIG_APM_DISPLAY_BLANK:

Help text

Enable console blanking using the APM. Some laptops can use this to turn off the LCD backlight when the screen blanker of the Linux virtual console blanks the screen. Note that this is only used by the virtual console screen blanker, and won't turn off the backlight when using the X Window system. This also doesn't have anything to do with your VESA-compliant power-saving monitor. Further, this option doesn't work for all laptops -- it might not turn off your backlight at all, or it might print a lot of errors to the console, especially if you are using gpm.

Hardware

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