Hello Community,

I am currently working on a project that uses the Fedora 9 distribution but I'm experiencing a fatal boot hang issue that occurs about 1% of the time when ACPI support is enabled (I need ACPI support). With quiet boot mode disabled here are the last 10 lines that appear before it hangs:

net_namespaace: 64 bytes
NET: Registered protocol family 16
ACPI: bus type pci registrered
PCI: PCI BIOS revision 2.10 entry at 0xff61a, last bus=1
PCI: Using configuration type 1
Settings up standard PCI resources
ACPI: Interpreter enbled
ACPI: (supports S0, S1, S3, S5)
ACPI: Using IOACPI for interrupt rounting
ACPI: PCI Root Bridge [PCI0] (0000:00)

When I say hang I mean a hard system hang, keyboard does not respond and system has to be powered down or reset button pressed.

My Questions:

1. What is the best way to debug this issue besides disabling quiet boot mode?
2. Is this a known issue on other target platforms?
3. Is there a work around to prevent this hang from occurring and still have ACPI enabled?

How I reproduce the issue:

1. Install Fedora 9 on target system via standard distribution install DVD (Fedora-9-i386-DVD)
2. Edit /etc/inittab by changing “id:x:initdefault” to “id:6:initdefault” (this makes the system reboot on startup)
3. Reboot system

Result: System will eventually hang (takes about 2 hours on my target system most of the time).

Your help will be greatly appreciated! Let me know if you need any additional info.

Classic sort of errors here would be the wrong module driving your hardware, or a bug caused by an event 2 hours in (perhapos a thermal event) Post your hardware (output of lspci/scanpci) I would build your own kernel with your m/b chipset built in, and minimum requirements in acpi. If you have a Via chipset, try setting up with 'acpi=off' as a boot parameter.

Then as you're in debugging mode, I'd add back features to acpi trying to make it hang. You have got time on your hands?