How to start Bumblebee or remove NVIDIA-Prime tearing?

Question

linux

There is some possibility that my question is pure cheating, because in fact there are two of them. However, I have no other options.
A small introductory digression: my laptop has Nvidia Optimus technology (naturally, there is no built-in support). Configuration: Kubuntu 19.04 , recommended and installed driver is nvidia-340.107. Video cards - Intel HD 4400 and Nvidia GeForce 820M .
And the first thing I would like to draw your attention to is quite a workable NVIDIA-Prime, except for two problems: 1) terrible tearing, not amenable to any sophistication (was killed all evening to no avail) 2) When switching to an Intel card and then trying to log in again, it encounters a black screen (still at the authorization stage, that is, SDDM) . Articles published on the net turned out to be a waste of time, tearing has been and remains. On the topic of switching, it all comes down to updating the microcode of the processor or reconfiguring the BIOS. Actually, the first question: is it possible to painlessly overcome the above problems on prime? (More interested in tearing, maybe someone came across)
There is also an alternative and well-known Bumblebee technology, but not everything is going smoothly here either: 1) it has not been updated since 14, respectively, official support for new versions should not be expected. 2) Attempts to blindly follow the documentation of those times lead exclusively to the mystery of the dark screen. And from the modern ones, which are published by enthusiasts, it is extremely difficult to give preference to a specific one, since they all differ in details: somewhere they add nvidia modules and drivers to the black list , somewhere they unload nouveau , adding only it. In one article, new repositories are connected and reconfigured, in the other they are not, but active kernel modules are manually registered. Etc. Hence the second question arises: how to start and is it really at all? What instruction to follow?

Answer 1

The solution turned out to be quite prosaic: stop following the trodden path, abandoning the recommended driver version. The reason is no less trivial and lies in the fact that when adding the ppa:graphics-drivers/ppa repository , the console displayed information about the latest version of the long-live driver, namely 410 with an attached link to the official nvidia website where the list of supported cards is indicated.
And guess what? That's right, it featured my "thank you" Ubuntu too! In general, my ideas about their recommendation system for installing drivers were completely destroyed, because it works according to the principle: the older and more unsuitable (the same tearing and other artifacts) - the more stable.
It was at the current moment that I decided not to get too far ahead and put 361 for the sake of experiment and everything worked out of the box, Carl!
PS: v-sync, oh yes, I've been waiting for you

Answer 2

As for tearing - put up with it, just don't waste your time, nothing can be done about it and the problem is very well known.

Answer 3

Hello! Kubuntu distribution 20.04 Intel i3+Nvidia 840M hybrid graphics. As described in the topic, after installing the nvidia 460 driver on a clean system, after restarting, the Nvidia 840M and terrible tearing are automatically turned on. Then I installed Steam. During installation, the console opened twice and required the superuser password. Put all sorts of dependencies and configs. Everything was installed and the tearing also remained. Prime did not switch, left on Nvidia. Then I did a reboot of the laptop and a miracle. There is no tearing in the mode with Nvidia (it happened recently) In general, there is no more tearing in any mode. And there is an indicator in the tray and shows that the graph goes through nvidia. Steam games start and work as expected with this video card without desynchronization in the picture. If you set the “on demand” mode in the green nvidia utility, then the graphics will work on intel and when you start games, nvidia is turned on, but I noticed that not in all games, and native ones. If the game is through a proton, then the card turns on everywhere. And in some native ones, you need to prescribe a command in the shortcut (well, that's another topic). And if you run the laptop completely through nvidia, then you don’t need to prescribe anything in the shortcuts, the whole system works through nvidia without tearing. Long live Gabe!