Comment 15 for bug 1596377

I'm not good at English

But I found a way to solve this issue by:

 + Update graphic driver by type:

       sudo ubuntu-drivers autoinstall

 + Then type:
       prime-select query

(I use Nvidia card)

 + Switch default graphic card by type:
       sudo prime-select intel or sudo prime-select nvidia

When I reboot laptop, the desktop load immediately. :))