Couldn't detect external monitor in ubuntu 18.04.5 with NVIDIA driver 455.38

Hi,all. It’s my 1st time of using this platform. Hope my format is correct.

I can’t even detect the external monitor when inside UBUNTU 18.04.5 but able to connect to the external monitor in WINDOWS 10.

My laptop is Acer Nitro 5 [AN515-44-R1AZ, AMD Ryzen 7 4800H + NVIDIA GeForce GTX 16500]

Current NVIDIA driver in my laptop is NVIDIA v455

Ways I have tried:
Secure boot is disable.

  1. I have tried to install [NVIDIA driver meta package from nvidia-driveri455(proprietary,tested] from the Software and Updates.
  2. Tried to install the package[nvidia-driver 450] which downloaded from (

Hope to hear from you guys soon.

After following this tutorial, I managed to connect to the external monitor but my laptop’s monitor hang at login screen.

Tutorial link: []

nvidia-bug-report.log.gz (286.4 KB)