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? -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stugg