What Wi-Fi card have you got? I managed to get an AR9565 from an old laptop working: https://www.insanelymac.com/forum/topic/328426-qualcomm-atheros-ar9565-wireless-for-os-x-108-1014/?do=findComment&comment=2692952switched back to Mojave, Catalina had several issues with wifi/bluetooth. my processor went from blazing performance too low. ill wait to upgrade
can you post Geekbench scores for your CPU running Catalina? as for the wifi card, I'm using dw1830
Hi,I've got this too, it's quite annoying. I have no idea how to fix it. (i7 1080p model).
I have another problem, relating to the backlight. About once in every 3 boots, the maximum brightness will be really low. I then need to reboot the laptop to fix it. Has anyone else been getting this issue?