http://bugzilla.kernel.org/show_bug.cgi?id=10377


[EMAIL PROTECTED] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|[EMAIL PROTECTED]|[EMAIL PROTECTED]
                   |bugs.osdl.org               |m
            Summary|Kernel freezes during boot  |Kernel usually freezes
                   |when AC is unplugged        |during boot when AC is
                   |                            |unplugged - unless
                   |                            |CPU_IDLE=n - Asus A6JC




------- Comment #6 from [EMAIL PROTECTED]  2008-04-09 18:40 -------
When running on AC, this system does not export C3.
eg. the dmesg shows

CPU0 (power states: C1[C1] C2[C2])

but when booting on DC, the screenshot shows that C3 is present.

This suggests that processor.max_cstate=2 is a good candidate
for a workaround.  Please boot on DC with CONFIG_ACPI_PROCESSOR=y
(not =m) and this cmdline param and see if the hang goes away.
If it does, then CPU_IDLE's C3 code is implicated.

In any event, a hang in the device probe part of kernel boot
usually smells like an interrupt problem...


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