Can somebody help me out !!!!!!

Chuck Swiger cswiger at
Tue Oct 3 13:04:10 PDT 2006

On Oct 3, 2006, at 12:46 PM, DeadMan Xia .... wrote:
> I compile the kernel with normal IPFIREWALL, IPFIREWALL_FORWARD. I  
> got some
> power with my power, every night my UPS batteries get discharged  
> and my
> system shutdown hard. its about 4 to 6 times my system get Hard  
> Shut in 2
> days. although i run fsck do make my filesystem fix.

You should connect your UPS to the machine and have it shut down the  
system cleanly before your UPS battery is exhausted.  At least, if  
your UPS is smart enough to do so.

> Now when i reboot my system, in dmesg i m getting warning like ....
> ioapic0: Changing APIC ID to 2
> ioapic1: Changing APIC ID to 3
> ioapic1: WARNING: intbase 32 != expected base 24
> ioapic2: Changing APIC ID to 4
> ioapic2: WARNING: intbase 64 != expected base 56
> ioapic3: Changing APIC ID to 5
> ioapic3: WARNING: intbase 96 != expected base 88
> ioapic0 <Version 2.0> irqs 0-23 on motherboard
> ioapic1 <Version 2.0> irqs 32-55 on motherboard
> ioapic2 <Version 2.0> irqs 64-87 on motherboard
> ioapic3 <Version 2.0> irqs 96-119 on motherboard

This is completely unrelated.  The APIC, "Advanced Programmable  
Interrupt Controller", is what permits newer machines to access more  
than the 15 IRQ's traditionally available using Intel 8259 PICs.  I  
believe that the default expectation was that each APIC ID would  
control up to 32 IRQ lines, but the APIC in your Dell is set up to  
only control 24 IRQs per ID.

In theory, you can ignore these warnings, although in practice there  
still may be interrupt aliasing issues between IRQs which should be  
separate but are multiples of each other modulo 32 (or 24? in this  
case?).  Again, this is unrelated to having your machine shut down  
uncleanly because AC line power failed...


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