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I have noticed that after I set the brightness (High to Low) in Ubuntu 13.10 and then after when I do my work. After rebooting up the PC, the brightness again turns to High. I'm literally tired of this. :'( :(

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My problem is reverse, It's going to low with both ubuntu 13.04 and Ubuntu 13.10.Why there is no fix for that? – devo Nov 2 '13 at 11:56

you should have a look at this thread:

Brightness is reset to Maximum on every Restart

i used the following in a startup script, but that's on an imac: echo 8 > /sys/class/backlight/acpi_video0/brightness

again, have a look at the thread above. lots of advice, something should work for you.

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