Zhao Yakui wrote: > I do the test as required. First the 0x02 is written to 0xCF9 I/O port. > The return value by reading the 0xCF9 I/O port is 0x02. Then the 0x06 is > written to the 0xCF9 I/O port. The screen becomes black but the box > can't be rebooted. What is the value of the CF9 port before you do anything? -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html