I installed Nvidia drivers, but something went wrong, and I ended up with a console. I don't really want to waste my and your time with it right now. So I tried to revert the changes. I uninstalled
nvidia-settings and ran
Xorg -configure. There was also some error. But the final result is, now the X and KDE are running. What I don't know why happened and what's more - how to fix it, is this:
I am without effects and most certainly without HW acceleration and possibly other things.
The integrated graphics card is as follows:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)<br><br>
XRender works, OpenGL does not