Enrico Zini was working on a digital signage based on Raspberry Pi 4, then he set the video output to 2560x1440, and all hell broke loose. And by that, I mean WiFi stopped working.
It was not obvious at first but after a full day of debugging, trying both micro HDMI outputs, different HDMI cables, three different Raspberry Pi boards, different power adapters, Raspbian Buster and Buster Lite, different MicroSD cards... He could reproduce the problem in all conditions, all he needed to do was to set the resolution to 2560x1440, and WiFi would just stop working. Setting