Brightness problem with Intel T4500
Posted: 31 Aug 2013, 16:23
I have a Gateway laptop with the T4500 chip, I've read that gives some problems with the brightness at sartup. If I power on the laptop with low brightness, screen goes black, but if I power on with max brightness everything is normal. Once in the desktop I can't change the brightness and the battery charger has to be pluged, otherwise the screen goes black.
Looking other forums and other threads here, I found that the solution is adding a line in /etc/rc.local and adding acpi_osi=Linux to kernel line. So how I can edit this lines?
Looking other forums and other threads here, I found that the solution is adding a line in /etc/rc.local and adding acpi_osi=Linux to kernel line. So how I can edit this lines?