https://bugzilla.kernel.org/show_bug.cgi?id=41762





--- Comment #3 from M. Vefa Bicakci <[email protected]>  2011-08-26 
06:12:54 ---
Created an attachment (id=70382)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=70382)
dmesg output after the mentioned test

To produce this output, the following actions were taken
with kernel 3.0.3:

# dmesg -c
# echo 0x04 > /sys/module/acpi/parameters/debug_layer
# echo 0x8800001f > /sys/module/acpi/parameters/debug_level

- run "yacpi"
- unplug AC adapter
- refresh display of "yacpi"
- plug in AC adapter
- refresh display of "yacpi"

I should also note the following:

In order to generate the events in dmesg, I had to run the "yacpi" utility
and after unplugging/plugging in the AC adapter, I had to refresh the "yacpi" 
utility's display. "yacpi" reads its information from /proc.

If I do not refresh "yacpi"'s display after taking plugging/unplugging the
AC adapter, then the kernel does not generate ACPI events.

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