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I always have to press by Fn + Brightness increase key in Ubuntu. I have switched off all the power management and still this happens. I am on a Lenovo ideapad U260 and can't to seem to set the brightness to same constant (high) at all times.

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up vote 4 down vote accepted

You can script this with xbacklight:

sudo apt-get install xbacklight

xbacklight -set 100 will set your brightness to 100%. You can add this as a new startup application (Search for 'Startup Applications', or I believe it's accessible by clicking the icon in the top right corner), or add this command to /etc/rc.local if you want it to happen earlier in the boot sequence

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I think, this should do. I might take time to reboot and test it, but without reboot xbacklight work and I believe it could work as a startup application too. Thanks. – Senthil Kumaran Jan 5 '12 at 18:21

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