Excuse me to insist something litte obvious, but just to double check: After you install Intel Linux Graphics, did you install the drivers?
You have to open this App and then let it install the right drivers for you.
Have completed with greens OK on all steps?
If still not working, try to boot from a Live CD/DVD/USB to check if your system somehow corrupted or not.
You processor / video card is definetelly suported.
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