On Tuesday 06 March 2007 00:56, Zhao Forrest wrote: > Hi, > > For RHEL4-U4-64bit, we can boot up kernel with ACPI enabled in BIOS > whether we add the kernel parameter "acpi=off" or not; however kernel > can't boot with ACPI disabled in BIOS whether we add kernel parameter > "acpi=off" or not. > > My question is, is there any difference between disabling ACPI in BIOS > and acpi=off from the kernel's point of view? There shouldn't be. However, it may be that the BIOS is doing something stupid when disabling ACPI, such as mucking up e820 -- which is technically part of ACPI, but Linux uses it in both ACPI and legacy mode. if you have the "debug" console log from the failed boot, that may give a clue. -Len - 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
