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The graphics card driver is very necessary

Even Windows needs to install drivers, and Ubuntu also needs them.

The graphics card drivers used by Linux distributions are generally open source versions, which are not as good as proprietary drivers in performance. So if you use Ubuntu as a desktop system, you definitely need to install it. Although there are fewer large-scale games under Linux, changing the graphics card driver will also greatly improve browsing the web.

It is very necessary, especially for graphics cards. The current open source ones are too bad and the temperature can burn your hands. Install the official closed source ones

If you have dual graphics cards, you must install them, otherwise you won’t be able to access the desktop.

I installed ubuntu14.10

If you can watch comfortably without installing the driver...that's fine...

But as you know, many things won’t work if you don’t install the driver.