after last update resolution of the screen is 1024*. Was - 1900. Version - 364.15 and 361.42 tested.
Xorg driver is working.
What video card are you running?
Asus GTX760-DC2OC-2GD5
The easy way is go to System>Preferences>Hardware>Display
If its not listed, have a look at the available sizes in terminal.
Code:
xrandr
You can use a GUI if you like.
https://wiki.ubuntu.com/X/Config/Resolution#Xrandr_Graphical_Front_End_GUI
permit was only one thing - 1024x768.
On this screen, no video card settings.
If you have nvidia driver packages as you note above, an alternative is to run the following terminal command (Ctrl + Alt + t) and remove them both and re-install only one!:
sudo apt-get remove nvidia-364 nvidia-361 && sudo apt-get install nvidia-361
You shouldn’t have both packages installed as one is sufficient and I don’t know how you got hold of nvidia-364 anyway as it isn’t showing in Synaptic?. 
RESTART AFTER RUNNING THE ABOVE COMMAND!.
Nice 
Don’t forget to mark this solved.
PS
Hi wolfman
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may be LTS version will work normaly.
Hi Serg,
I think the 364 package is for testing only?, you have the 361 package installed which is good!.
Greetings to you too!.
In the evening, I try to update the system, and again there was the same situation. Uninstall and reinstall the driver Nvidia 361.42, did not help. Again he fell back to a previous restore point. Driver Xorg not give that performance that Nvidia.
https://drive.google.com/open?id=0B-u7sukKQvftWTFOTXZIcmRCWWs
I have an Asus GTX 970 that was giving me the same problem after I upgraded from 15.10 to 16.04. When I dug in, I found that there was a problem with DKMS rebuilding the driver. I had some very disturbing pop-ups talking about my secure boot key not being valid. I found the option in my BIOS for secure boot, and switched it off (didn’t know I had it on, or that it had a password set). Now my monitor and the video modes are detected properly.
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Hi Serg,
how did you install?, disk or USB and did you follow this advice?:
I installed the beta version 2 flash disk. Then I do the update. Until yesterday, the update worked fine. BIOS worked uefi mode.
I have also realized that the problem with downloading uefi. I switch to compatible mode, but it did not work.
While I am working without the latest updates. I hope that this problem will be solved subsequent updates.
Have you done a complete system update?:
No. Thanks, will test.
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All happened through the “Welcome screen”. Thanks for the help.
Great to hear, please put a tick in best answer to mark it as solved so it helps others; thanks!.
after update my problem again reappeared. As I understand it happens after a kernel upgrade from 18 to 21 version.