Why are you trying to install drivers manually? The Linux kernel
already has Intel drivers, although the version included with distro and its kernel might be slightly older (a few months older, max) version compared to what you'll get from Intel. It is best to run with whatever comes with distro (default) otherwise you might get....hosed.
If you want to see which version of driver you have on your system, try using Synaptic Package Manager and search/filter for "Intel". You can easily re-install drivers from there and also make sure there are no broken packages.
Only reason to install drivers manually and be on the bleeding edge is if you are a developer and are willing to tolerate or fix all these oops. If you want the latest drivers for any performance gains they offer just upgrade to Ubuntu 14.10 which should be released in a little over a month.
I don't think waiting six months for a driver upgrade is a chore, specially since drivers development is slow. Mayhaps as gaming takes off on linux and Intel iGPU get stronger this will become an issue and Intel will have to find a way to get better drivers to users in a shorter cycle, but right now they are not at that bridge.
The best way to use graphic drivers with any *buntu system are, in this particular order:
- Use whatever driver the distro came with and was installed by default. This will be most stable option as it has been tested thoroughly with a specific x server version, a specific kernel etc.
- Use a PPA / third party repository to keep you on bleeding edge of x server and graphic development. But you risk regressions and unstability. There are also trust issues, thid party might inject anything. In fairness this issue is far worse on Windows side and people do not seem to mind.
- Install drivers manually (as is done in Windows land) from a binary package you downloaded off the manufacturer's site. This is the most problematic method because software testing is nowhere near as thorough for Linux distros as in Window land and the entire system is very immature. Intel simply do not devote as many developers to their open-source driver compared to effort they put for Windows, although they are still leagues ahead of nvidia and AMD (which is not saying much, now is it).
Linux distros in general are built around package managers, thus installing software that has complex dependency issues (like graphic drivers) willy-nilly can cause all sorts of regressions and problems even if the driver itself is bug-free.
If you are still determind to install drivers manually, make sure you
upgrade the entire stack. The stack means all the various components have received testing
together and are considered working by the developers (although this testing will not be anywhere near as thorough a distro release gets). Finally, always read the 'known issues' in changelogs
before upgrading.