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There's no such thing as an Intel HD 4440, there's the common 4000 and 4400, and the less common 4200 and 4600. There are no other entries in the 4xxx series of Intel HD as far as I know.

So likely, your brother has a 4400.

I had Sandy Bridge and now I have Skylake CPU. Work fine most of the time, but crash on some games. I don't know why because error messages are usually ambiguous.

I also have Haswell on desktop with Windows, so maybe I can check these games on different systems.

My experience is that Intel cards produce more problems with OpenGL. But not related to Linux, same on Windows. Part of the reason might be that it's not so common for 3D developers to work with Intel cards so those are less tested.

The other side of the coin is that big name GPU manufacturers spend a lot of time working with game developers to fix issues both with the games and with their own drivers. You often see Day 0 driver updates that coincide with major game releases. This kind of constant test and refinement squashes a lot of bugs over the long term.

Intel doesn't do that. You basically get the driver that they originally wrote for your chip and that's it.