Just a heads-up:
It seems you have
as KBP … but yet
AFAIK there should be no alternate there.
Can you check /etc/modprobe.d/mhwd-gpu.conf if has this lines:
blacklist nouveau
blacklist ttm
blacklist drm_kms_helper
blacklist drm
I suppose you are not using Wayland session. Is that correct?
From terminal
echo $XDG_SESSION_TYPE
Please also check the extensions you use, disable them for a moment and see if the hang is still happening when opening applications.