How can I restore the original version of X.Server?

Question

linux

What is the essence of the problem. I am a beginner Linux user. I downloaded the Mageia 5 distribution on my laptop. Forced (through shamanism and magic) to work a discrete video card, Bumblebee and everything was fine. But recently the devil pulled me to update the system. But I did not notice something, after which optirun does not want to start and writes the following to the console:

[ 4333.013693] [ERROR]Cannot access secondary GPU, secondary X is not active.

[ 4333.013762] [ERROR]Aborting because fallback start is disabled.

I think it's all about updating ... Please save me, because I don't want to re-install all sorts of oversized stuff and rummage through the system for hours =(
UPD: There are no configs in the old place /etc/X11/xorg.conf. Where did I go without UPD
: Solved the problem ^_____^ I went to the X-server settings from the general system settings, the configurator asked me to re-specify the driver used (intel 810 and later, when choosing nvidia, then the system does not boot), I constantly pressed further and oh, to! works...
And the configs appeared in place :D I wonder how X.Server worked without configs.. In a word: magic XD

Answer 1

Solved the problem by re-configuring the display in the "Mageia Control Center" and rebooting. The system itself restored the configuration and started working normally.