[Bug 55161] Backlight Software control is acting wrong

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=55161





--- Comment #1 from pqwoerituytrueiwoq at gmail.com  2013-03-16 18:17:24 ---
Using the fn+brightness keys allows it to be set in acpi above 10 maxing at 15,
but values over 10 do nothing more or less than 10

This may be useful info:

~$ uname -r
3.6.11-030611-generic
~$ xbacklight -set 0;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 10 of 10
0.000000
Cooling 0: LCD 10 of 10
~$ xbacklight -set 100;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 0 of 10
100.000000
Cooling 0: LCD 0 of 10
~$ xbacklight -set 50;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 5 of 10
50.000000
Cooling 0: LCD 0 of 10
~$ ls /sys/class/backlight/*
/sys/class/backlight/acpi_video0:
actual_brightness  brightness  max_brightness  subsystem  uevent
bl_power           device      power           type

/sys/class/backlight/intel_backlight:
actual_brightness  brightness  max_brightness  subsystem  uevent
bl_power           device      power           type



~$ uname -r
3.9.0-030900rc2-generic
~$ xbacklight -set 0;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 0 of 100
100.000000
Cooling 0: LCD 10 of 100
~$ xbacklight -set 100;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 10 of 100
90.000000
Cooling 0: LCD 9 of 100
~$ xbacklight -set 50;acpi -c | grep LCD;xbacklight -get;acpi -c | grep LCD
Cooling 0: LCD 5 of 100
95.000000
Cooling 0: LCD 10 of 100
~$ ls /sys/class/backlight/*
/sys/class/backlight/acpi_video0:
actual_brightness  brightness  max_brightness  subsystem  uevent
bl_power           device      power           type

/sys/class/backlight/intel_backlight:
actual_brightness  brightness  max_brightness  subsystem  uevent
bl_power           device      power           type

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