On Thu, 2006-01-26 at 21:22 +0000, Barry Samuels wrote:
I recently swapped my computer into a new case - that includes the mainboard, PCI adapters and other peripherals including the hard drive with the existing operating system.
The only thing that may have changed is that some PCI adapters *may* be in different slots.
If I want the system (Debian) to shutdown it does but the power now won't go off although before the swap it always did.
It's most likely an acpi problem..I'd take a look at the kernel boot options to enable/disable these and get the magic combination that works with your hardware.
I'd go for noacpi as my first try, just add this to your boot parameters (usually you can interrupt lilo or grub at boot and add these manually)
If that doesn't work for you then you could try disabling the apic as well (although it doesn't sound like an apic problem to me. If all else fails try noapic
I did have a strange problem with a Compaq machine a while ago whereby as long as a 3com 3c905c was installed it would shutdown and power up again when issued a halt, in that case noapic did the trick for me.