The correct driver for your Intel GPU comes built-in already, but you have made two mistakes:
1. The "oibaf" PPA you are using for graphics packages is not supported by Ubuntu and is known to cause bugs. You should remove it.
2. The "xserver-xorg-video-intel" driver is old and should not be used anymore. It does not hurt to have it installed but nobody should create any Xorg config files that use the "intel" driver.
The correct driver for your Intel GPU comes built-in already, but you have made two mistakes:
1. The "oibaf" PPA you are using for graphics packages is not supported by Ubuntu and is known to cause bugs. You should remove it.
2. The "xserver- xorg-video- intel" driver is old and should not be used anymore. It does not hurt to have it installed but nobody should create any Xorg config files that use the "intel" driver.