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Ubuntu 20.04 Dual Boot won't detect 2nd monitor

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  • Laptop: HP ZHAN 66 Pro A 14 G4
  • CPU/APU: AMD Ryzen 7 5800U with Radeon Graphics
  • Kernel: 5.8.0-43

I've finally decided to move from Windows to Ubuntu and its not going smoothly. I've been going at it for hours but Ubuntu refuses to detect my external monitor (connected via HDMI). I know it isn't an issue with the monitor/cable since Windows detects it with no problems.

Most of the results from google about this involves installing or updating Nvidia graphics cards (which this laptop does not have) so I'm at a loss to what I am missing for something this simple.

I've tried commenting out blacklist microcode from amd64-microcode-blacklist.conf

I've also checked xrandr which returned this xrandr: Failed to get size of gamma for output default which I'm not exactly sure if it's related to my problem as I'm rather new to Ubuntu and the last time I used it I didn't exactly need a 2nd monitor for work.

I've also tried re-installing Ubuntu 20.04 too but that didn't do anything either...

Anyone got an idea to how I can fix this?

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