acpi wakeups

[Adam Lantos]

hello,

I have lot of acpi wakeups (~50 per sec), when polling battery
info/status through acpi


nibbler ~ # watch cat /proc/acpi/battery/BAT0/info

causes
  35,8% ( 46,7)       <interrupt> : acpi

and
nibbler ~ # watch cat /proc/acpi/battery/BAT0/state

causes
  15,4% (  8,5)       <interrupt> : acpi

watch executes every 2 seconds, so I suppose it should *not* cause
this many wakeups.


xfce4-battery-monitor for instance, polls every second, and is
responsible for 55 wakeups per second. (I have patched so now it makes
every single poll per minute, but I wonder if someone have the same
acpi-related problem)

kernels 2.6.21 and .22-rc3 both suffer this issue (with and without
powertop patches)

can you suggest me some way to investigate wheter this is a bug in the
acpi subsystem or just the normal behaviour?


yours,
 adam