With 2.6.19.2, init 0 works with 2.6.20, it causes this box to reset when it should poweroff, and thus it reboots. any suggestions on where to look first? thanks, -Len Success case: Linux version 2.6.19.2 (lenb@d975xbx2) (gcc version 4.1.2 20061115 (prerelease) (SUSE Linux)) #5 SMP Sun Feb Command line: root=/dev/sda2 console=tty0 console=ttyS0,115200n8 debug ... # init 0 ... The system will be halted immediately. Synchronizing SCSI cache for disk sda: ACPI: PCI interrupt for device 0000:06:03.0 disabled ACPI: PCI interrupt for device 0000:05:06.1 disabled ACPI: PCI interrupt for device 0000:05:06.0 disabled ACPI: PCI interrupt for device 0000:05:04.1 disabled ACPI: PCI interrupt for device 0000:05:04.0 disabled Power down. acpi_power_off called hwsleep-0285 [02] enter_sleep_state : Entering sleep state [S5] Failure case: Linux version 2.6.20 (lenb@d975xbx2) (gcc version 4.1.2 20061115 (prerelease) (SUSE Linux)) #1 SMP Sun Feb Command line: root=/dev/sda2 console=tty0 console=ttyS0,115200n8 debug ... # init 0 ... The system will be halted immediately. Synchronizing SCSI cache for disk sda: ACPI: PCI interrupt for device 0000:06:03.0 disabled ACPI: PCI interrupt for device 0000:05:06.1 disabled ACPI: PCI interrupt for device 0000:05:06.0 disabled ACPI: PCI interrupt for device 0000:05:04.1 disabled ACPI: PCI interrupt for device 0000:05:04.0 disabled Power down. acpi_power_off called hwsleep-0285 [02] enter_sleep_state : Entering sleep state [S5] - 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