Hello. I am having trouble with an HDMI expansion card. I have Mint 21.3 and kernel 6.5.0-14-generic.
When plugging the HDMI cable, the external display will light up, as if it was detecting something, but then I will go back to energy saving mode, and that’s all.
I also tried installing a DisplayLink driver, but after enrolling a BIOS password, as per the instructions, the computer no longer booted, and had to resort to TimeShift to revert it.
I am not familiar with xrandr and how it works. I would greatly appreciate any guidance on how to debug this, or get a clue on what the issue could be.