https://bugzilla.kernel.org/show_bug.cgi?id=15532





--- Comment #30 from Jaromír Cápík <tav...@volny.cz>  2010-03-24 13:45:51 ---
Created an attachment (id=25682)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=25682)
dmesg of the acpi debug

I used the following script to collect the particular dmesg outputs for maximum
brightness set in GRUB and for the minimum brightness set in grub ...
differences are seen with diff/kdiff3 ...

#!/bin/bash
mount -t debugfs none /sys/kernel/debug
sleep 1
cat _BCM.aml > /sys/kernel/debug/acpi/custom_method
sleep 1

dmesg > ./dmesg/initial.txt

max_brightness=`cat /sys/class/backlight/acpi_video0/max_brightness`
cur_brightness=0

while [ $cur_brightness -lt $max_brightness ]; do
  echo $cur_brightness > /sys/class/backlight/acpi_video0/brightness
  sleep 1
  dmesg > ./dmesg/$cur_brightness.txt
  let cur_brightness=cur_brightness+1
done

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