I see here: http://www.via.com.tw/en/support/drivers.jsp
I can download drivers for linux for chipset via.
They are in format tar.gz

Is there some universal way to install them to my OS?

Hello,

The preferred way is to first check if you have the same packages available through your package manager (apt-get, synaptic). If not then you can go ahead and use the downloaded tar.gz file.

Tar.gz files are mostly compress source or installation programs. First you unpack/uncompress them with the command:
That will create a directory (normally with the packagename in it). CD into that directory and check if you have a README. Read that file to get the next steps. Mostly is an install script or you'll have to use the following:
one after another if no errors are encountered.

Kind regards,

Eric

And that's all?
Do I need to add some module anywhere or add some code to execute everytime I start my computer or only these steps is all I need?

Hello,

It depends on what you want to install. Normally if you install something from source or from a tar.gz package like you want to, then the installation assumes that you'll have the necessary dependencies already installed. If not then it will exit on an error and you'll have to take it from there.

For packages with drivers then normally the included install script will do the necessary. What are the contents of the package? Can you list them here? I don't want to download what I don't need/use.

Kind regards,

Eric

I guess, you already have all available "via" :

.. In the kernel ( modules ) :

ls -R /lib/modules/ | grep via
.. will show a lot.

And : ls -R /usr/lib/xorg/ | grep via
.. for the X driver(s).
.....