I am also facing a similar issue.
I have lenovo legion laptop and have installed ubuntu 18.04 on the same. I am able to install nvidia-440 drivers for GTX 1650 graphics card, however the laptop screen gets stuck after login with just the cursor showing.
nvidia-bug-report.log (1.1 MB)
Can you please help me with the same?
In the previous log file, there could be some spurious libraries. I removed nvidia drivers, used auto-remove, auto-clean and reinstalled resulting into the same issue. Hope this file helps to identify the issue better.
nvidia-bug-report.log (1.2 MB)
Please let me know if this can be resolved.