How did i install intel linux graphics driver and it works for me:
For Ubuntu 14.04 with kernel linux-image-3.16.0-30:
1. Install kernel If not yet installed:
$ sudo apt-get linux-image-3.16.0-30-generic linux-image-extra-3.16.0-30-generic linux-headers-3.16.0-30-generic
2. Remove old kernels, e.g.:
$ sudo apt-get purge linux-image-3.13.0-24-generic linux-image-extra-3.13.0-24-generic linux-headers-3.13.0-24 linux-headers-3.13.0-24-generic
3. Add intel linux graphics repo:
$ sudo sh -c 'echo "deb https://download.01.org/gfx/ubuntu/14.04/main trusty main #intel-linux-graphics-installer" > /etc/apt/sources.list.d/intellinuxgraphics.list'
$ wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg -O - | sudo apt-key add -
$ sudo apt-get update
4. Install driver:
$ sudo apt-get install --reinstall i915-3.16-3.13-dkms xserver-xorg-video-intel i965-va-driver intel-gpu-tools
Next step might be unnecessary if backlight change works for you:
5. Add kernel param: acpi_osi=Linux instead of: acpi_osi=Linux acpi_backlight=vendor to linux line in /boot/grub/grub.cfg via grub-customizer.
Next step might be unnecessary if backlight change works for you:
6. Create file /etc/X11/xorg.conf.d/20-intel.conf with content:
Section "Device"
Identifier "card0"
Driver "Intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
7. Update initramfs:
$ sudo update-initramfs -u -k all
And it works after reboot.