Ubuntu 20.04 on Acer Nitro 5 and nVidia GPU, external Monitor through HDMI not working
drivers - Second monitor not detected, brightness not working... with Nvidia (GTX 1660ti) and Ubuntu 20.04 (kernel 5.4.0) - Ask Ubuntu
Ubuntu 18.04 black screen at startup after installing a driver for MX450/Cannot adjust brightness/No 2nd monitor detected through HDMI - Linux - NVIDIA Developer Forums
Fixing problems with audio not sounding after upgrade from Ubuntu 18.04 LTS to 20.04.1 LTS | Carles Mateo
Aspire A715-72G Remote display does not detect/work on linux ubuntu 18.04 — Acer Community
Ubuntu 18.04b — Solved — Could not see second monitor — Nvidia Graphics card | by Ashley Tharp | Medium
18.04 - External monitor not connected - Ask Ubuntu
The resolutions you want do not appear in the Ubuntu display settings? | From Linux