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 -w: only write a wtmp reboot record and exit. -d: don't write a wtmp record. -f: force halt/reboot, don't call shutdown. -p: power down the system (if possible, otherwise poweroff) ...but poweroff -f killed power (immediately, apparently) and poweroff -p caused a normal poweroff (ie with shutdown) -S -- Simen Thoresen - Dolphin ICS Systems Administrator