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
--
Simen Thoresen - Dolphin ICS Systems Administrator
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