ACPI vs. APM - Which is better for desktop and why?

[Justin Piszcz]

I have enabled ACPI on my Dell GX1 (Pentium 3/500MHZ) machine and disabled 
APM, however, what are the benefits of using ACPI over APM?

I am using Kernel 2.6.7

I see ACPI eats up an IRQ and does not share it:

$ cat /proc/interrupts
           CPU0
  0:   64997374          XT-PIC  timer
  1:         10          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  5:       2625          XT-PIC  Crystal audio controller
  8:          1          XT-PIC  rtc
  9:          0          XT-PIC  acpi
 10:     277489          XT-PIC  ide2
 11:   11465050          XT-PIC  ide4, ide5, eth0, eth1, eth2, eth3
 12:         58          XT-PIC  i8042
 14:     307536          XT-PIC  ide0
 15:         53          XT-PIC  ide1
NMI:          0
LOC:   65007290
ERR:          0
MIS:          0

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