As the title states I recently purchased an 81X2 IdeaPad Flex 5 14ARE05 with an AMD Ryzen 7 4700U with Radeon Graphics (8) @ 2.000GHz for the CPU and an AMD ATI 04:00.0 Renoir for the GPU. I installed Ubuntu 20.04 and chose to install 3rd party proprietary drivers etc.. I then tried to connect it to an external monitor through HDMI and it did not work. The monitor and HDMI cable are fine, I just used them yesterday and they worked just fine. What information do I need to diagnose the problem, and then how do I fix it? Apologies for not posting more information, I have no idea where to start and all of the answers online were for Nvidia.
Edit: I tried installing Xubuntu without the 3rd party driver option and it still does not work. The menu for displays comes up when i connect and disconnect the HDMI so it must detect something. Regarding the actual technical info, this is what I got from lspci -i:
04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Renoir (rev c2) (prog-if 00 [VGA controller])
Subsystem: Lenovo Renoir
Flags: bus master, fast devsel, latency 0, IRQ 255
Memory at 460000000 (64-bit, prefetchable) [size=256M]
Memory at 470000000 (64-bit, prefetchable) [size=2M]
I/O ports at 1000 [disabled] [size=256]
Memory at fc500000 (32-bit, non-prefetchable) [size=512K]
Capabilities: <access denied>
Kernel modules: amdgpu