i have ubuntu 11.10 installed on gateway nv54.
I want to install drivers for video card because the Screen brightness not changing..
But "Additional Drivers" not detecting anything.
Graphics: Mobile Intel® GM45 Express Chipset
Thank you.
Your graphics driver is part of the default installation.
To check it and to know which driver is currently in use open a terminal and type this in
sudo lshw -C display
Look for a line that says configuration: driver=i915 latency=0. If its present then the drivers are enabled.
To keep the driver updated you just need to keep your system updated with the Update Manager.
To be able to use the brightness buttons you need to add something to your grub configuration file.
Open it with you favorite text editor in a terminal, ie gedit
gksudo gedit /etc/default/grub
Locate the line
GRUB_CMDLINE_LINUX=""
and change it to
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"
Save the file and in a terminal type
sudo update-grub
Reboot your computer with
sudo reboot
Your brightness buttons should now be working as expected.
(source)
