Hello, I'm using RHEL3 AS. I want the PC power off by executing /sbin/poweroff , but the binary kernel RPM (2.4.21-4.EL) seems to be compiled without ACPI support. The PC supports ACPI, and the power off works for RHL9's kernel (2.4.20-8) and vanilla kernels (2.4.26, 2.4.27) if I recompile them with APM and ACPI support. I recompiled 2.4.21-4.EL with ACPI support (choosing [*] for all ACPI related topics) based on /boot/config-2.4.21-4.EL , but the power off still doesn't work. The PC is IBM's BladeCenter, with HyperThreading and ACPI support, but no APM support ( the kernel says "apm: BIOS not found." ). I tried both UP and SMP kernel configurations. Can the RHEL3's kernel support "power off" functionality using ACPI? Is there a binary kernel RPM compiled with "power off" functionality using ACPI for RHEL3? Regards. ----- Tetsuo Handa