Simen Thoresen wrote: > Rudi Ahlers wrote: >> Simen Thoresen wrote: >>> Hi all, >>> >>> I'm trying to troubleshoot my way thru a ACPI-issue on several >>> machines with the Asus P5N32-E SLI motherboard (S775, Nvidia 680i >>> chipset) >>> http://www.asus.com/products.aspx?l1=3&l2=11&l3=397&l4=0&model=1459&modelmenu=1 >>> >>> >>> This is CentOS 4 x86_64, and appears on all tested kernels, including >>> kernel-smp-2.6.9-67.0.4.EL >>> >>> My symptoms are that the machine won't reboot on the reboot command. >>> 'poweroff' does turn the power off and halt halts the system (without >>> turning the power off), but reboot effectively does a 'halt'. >>> >>> I can 'fix' this by giving the 'acpi=off' parameter to the kernel in >>> grub, but this causes other problems (some of these machines have >>> quad-core CPUs, and these require ACPI to initialize 3 of the cores. >>> The dual-core CPU-machines work with acpi=off. >>> >>> With acpi=off, reboot works as it is supposed to. >>> >>> I think the root of this issue is the Asus BIOS - we also have >>> several Asus M2N-SLI Deluxe (Athlon64, Nvidia 570 chipset) systems >>> that started exhibiting the same symptom after a BIOS upgrade. On >>> these acpi=off does not cause other problems, so this is no issue for >>> us now. >>> >>> Any suggestions? I think I understand that turning ACPI off basically >>> turns APM on, and that APM reboot works. Is there a way to do reboot >>> with APM instead of ACPI? >>> >>> Yours, >>> -S >> What does "poweroff now -r" do? >> > > Nothing. > > [root at jelen-10 ~]# poweroff now -r > usage: poweroff [-n] [-w] [-d] [-f] [-i] [-p] > -n: don't sync before poweroffing the system > ...but poweroff -f killed power (immediately, apparently) > > and poweroff -p caused a normal poweroff (ie with shutdown) > ...and 'shutdown -r now' did the same as 'reboot' - ie 'halt' without poweroff. -S -- Simen Thoresen - Dolphin ICS Systems Administrator