Control: retitle -1 5GHz WiFi does not work with vc4.ko on RPi4 and 4K display Control: tags -1 + upstream Control: severity -1 normal
It turns out that the reported symptom happens with 5GHz Wifi and 4K display resolution at 30 Hz refreshing rate. Since the condition is rather limited, I lowered severity to normal. This is an upstream issue. It is being discussed at "linux-rpi-kernel" mailing list. Best regards, Ryutaroh Matsumoto