Actually only these 2 lines need to be inserted:
Driver "intel"
Option "Backlight" "intel_backlight"
Should also have mentioned the link for the solution to that issue:
...
Type: Posts; User: philo
Actually only these 2 lines need to be inserted:
Driver "intel"
Option "Backlight" "intel_backlight"
Should also have mentioned the link for the solution to that issue:
...
The "No outputs have backlight property" error is apparently because xbacklight does not choose the right directory in /sys/class/backlight. Running:
ls /sys/class/backlight
shows that...
As a followup, using the function keys for brightness (in my case: fn+Alt+F5 or F6) seems to be remembered. So, at least for me, there is a workaround.
ON the same computer, xbacklight was working well with Knoppix 7.4 and 7.6.
It is not working for Knoppix 7.7.1. The command:
xbacklight -get
returns:
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