Kamal, here are the answers
sm@D430:~$ ls /sys/class/backlight
dell_backlight intel_backlight
There's no "acpi_video0", so I can't try the instruction you've
provided.
The problem with the backlight is the following. The screen of the
laptop I use has different levels of brightness and usually
Marhaba, Kamal
The problem partially resolved. If the screen goes blank due to the
standby then everything is OK and the backlight restores. But if I close
the lid (w/o suspend or hybernate) then thebrightness resets to minimum
as usual.
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https://bugs.launchpad.net/bugs/876711
Title:
Screen brightness resets to minmized when screen turns off
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Public bug reported:
The brightness of the laptop screen (Dell D430, intel video, standard
driver) always resets to minmized when screen turns off and on again.
While trying to make it maximized using standard keys the brightness
progress bar does not function properly - if one presses continuousl
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