I can't re-login after changing Intel GPU to Nvidia GPU

[Péter Gaál]

The NVIDIA X Server Settings asks me to re-login after changing GPU. After the logout I can’t log back into my account. After pressing the login button the screen goes black and after 3 seconds Ubuntu throws me back to the login screen. If I reboot the system then I can login and the system operating with the Nvidia GPU. If I change back to Intel GPU the same happens.

Ubuntu 17.10
package: nvidia-384
 version: 384.111-0ubuntu0.17.10.1
System Information
 NVIDIA Driver Version: 384.111
X Server Information:
 Server Version number: 11.0
 Server Vendor String: The X.Org Foundation
 Server Vendor Version: 1.19.5 (11905000)
 NV-CONTROL Version: 1.29
 Screens: 1
Graphics Card Information:
 Graphics Processor: GeForce GTX 850M
 CUDA Cores: 640
 VBIOS Version: 82.07.2a.00.02
 Total Memory: 4096MB
 PCIe generation: Gen3
 Maximum PCIe Link Width: x16