My display brightness adjustment is off by a factor of 10, i.e. it's brightest at 10% instead of at 100%, and the difference between 0% and 1% is a little too high.
Any way to fix either of these problems? (VAIO CW laptop)
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From the information you've given us, it appears that you need to change your GRUB settings.
To do that, open up a terminal and run the following commands:
I have the same laptop and have the same problem. What i have found is that if you go in to gnome configuration editor (gconf-editor) there you navigate to apps, gnome-power-manager, backlight. If i change the key brightness_ac from values 0-12 it affects my screen brightness. However values over 12 up to 100 doesn't make any difference to the brightness compared to 12. When i use the fn+ f5, f6 keys it seams to adjust the brightness in values from 0-100 with increments of 5. I hope this make sense for someone with more knowledge in ubuntu then me