Raspberry Pi 4B single and dual screen Settings 1. Open config.txt, add the following configuration and save. [hdmi:0] disable_s
gpu_mem not effective when not placed in config.txt but included extraconfig.txt · Issue #1332 · raspberrypi/firmware · GitHub
![I added the line on this Ubuntu config.txt file. Why are the keyboard and mouse not connecting? : r/NexDock I added the line on this Ubuntu config.txt file. Why are the keyboard and mouse not connecting? : r/NexDock](https://i.redd.it/6aclymdnczj71.jpg)