Power Management; Important Information On Linux - Kontron ePanel-C3 Technical Manual

Technical Manual ePanel-C3 Version 1.04

6.3. Power Management

Power Management is only available from Hardware Revision 1.03 and BIOS Version 2.00. Supported are
ACPI 1.0b and 2.0. The only Sleep State the board is capable of is S3 (Suspend to RAM). In this case, the
power consumption is reduced to the absolute minimum required to operate certain parts of the chipset and the
DDR-RAM (power consumption drops to approx. 1 W).
In order to go into or come out of suspend mode, you can use the Power-Button
It is recommended to close all applications before activating suspend mode, because some programs does not
support this operation mode (e.g. query of the message WM_POWERBROADCAST under Windows). It cannot
be guaranteed that a program will automatically continue to run after power-up.
Approval exists for the following operating systems:
Microsoft WINDOWS 2000 (with exception of Audio driver)
Microsoft WINDOWS XP Professional
Microsoft WINDOWS XP Embedded
LINUX SUSE 9.3 (X11 graphics system with KDE desktop)
Notice for LINUX SUSE: the boot line should contain the following parameters (example SXGA resolution, 16
bit color depth = VESA mode 0x11A). In certain cases, the vga entry can also be left out.
vga = 0x31A acpi_sleep = s3_mode
Note: with all other operating systems, no guarantee can be made on error-free functioning of the Power
Management.

6.4. Important Information on LINUX

Due to BIOS limitations you should take care that GRUB bootloader files are located within the first 1023
cylinders (less than 8GB). Otherwise Linux generates the message:
Error 18: Selected cylinder exceeds maximum supported by BIOS
This can be circumvented by creating a boot partition at the beginning of the disk that is completely within the
first 1023 cylinders of the harddrive. This partition will contain the kernel.
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