Ubuntu 14.04

I've used Ubuntu Mate 15.04 in my laptop Acer Aspire V3-371-507P, but it seems that the OS has some problems ( I think it's the capability, the laptop always has many problems XD), and the most severe problem is the screen resolution, it would flash and I try to upgrade the intel HD driver but it doesn't work. I think that the origin of the screen doesn't fit my laptop. So I return to use the Ubuntu 14.04 LTS version, it may more stable. Now it looks good. The environment setting I have put on this blog, .vimrc and .bash_alias.