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recently I switched to Ubuntu Gnome 14.10 64 bits on my laptop and I'm having some issues with the brightness. At first I couldn't change with the hotkeys, but I have already fixed it. The problem now is that the brightness is too low, but the indicator, the settings and the files in /sys/class/backlight show that it is at max.

I have dual boot with W7 so I tried starting Windows just to make sure it is not a screen problem, but in Windows it works fine.

I'm using the Nvidia 331 proprietary drivers.

Does anybody knows how to set the brightness to it's actual max? Thanks.

P.D.:My laptop is a Lenovo Ideapad Z500 with a i7-3632QM and a Nvidia GT645M.

Javier Salcedo
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1 Answers1

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I found a post in the Arch Linux forums, that suggests the following kernel parameter for the Lenovo Ideapad Z500:

acpi_backlight=vendor

Please try this and give feedback if this solved your issue.

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