Hello guys,
I am new here. The configuration of my PC is:
1. Processor: AMD® Ryzen 7 2700 eight-core processor × 16
2. GPU: NVIDIA Corporation TU104 [GeForce RTX 2070 SUPER]
3. OS: Ubuntu 20.04.2 LTS
4. GNOME: 3.36.8
5. CUDA: Cuda compilation tools, release 10.1, V10.1.243
When I import a video in media tool, I cannot preview it in the source window as it is complete black. When I drag the video to timeline, only audio is getting added and even that I am not able to play in the timeline preview window.

- Image of timeline
- davinci1.png (91.83 KiB) Viewed 365 times
Here is my preferences screenshot:

- preferences
- Davinci2.png (45.86 KiB) Viewed 365 times
Please let me know how can I fix this. Also, if you need any more details, please let me know the steps to get those details, I will post it here.
Thanks in advance.
Abhash Sinha