Ubuntu driver 5.3.1 bug
You should correct the Ubuntu driver to create the support frame buffer /dev/fb1
In the last version 5.3.1 installed in Ubuntu 20.04 it's not created.
Without the /dev/fb1 is not possible to set up a multihead system with loginctl.
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James Mery commented
Driver bugs can be frustrating when everything seems configured correctly but the hardware still behaves unexpectedly. I usually find it helps to verify the basics before troubleshooting deeper issues. The same approach works with unfamiliar plants too https://plantidentify.net/ can quickly identify a plant from a photo before you start researching its specific needs.
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Benjamin Henry commented
Driver compatibility bugs on Linux can be incredibly frustrating, especially when updates suddenly break multi-display setups that were working fine before. Threads like this are useful because they help users compare experiences and narrow down whether the issue is hardware, software, or driver related. It’s interesting how fast AI-assisted detection tools are improving in completely different fields too. I’ve been using https://buganalyzr.com/bug-bite-identification/ recently to identify insects and bug bites from photos, and the pattern recognition accuracy is honestly impressive.
