Now I checked the LE image - everything works. HDMI is working, video decodes with HW. there is no kernel panic, what you see are service messages, if there was a kernel panic, you would not be able to output DMESNG. And the memory speed is also fine, it is more than enough for the system to work (including for software decoding of the 1440p format). Check your monitor so that it meets the operating conditions of the main core (1080p).