I almost forgot why I didn't use the installed Ubuntu 19.04, besides its HDMI is not working -- it's menu crashes all the time on me as well.
Just wave the mouse over the Ubuntu 19.04's menu up and down a few times, and it'll crash. As simple as that. Then the whole Ubuntu desktop freezes up, until I have to kill it from the console.
Finally found someone experiencing the same as me:
and I quote:
... it still crashes all the time and is as stable as a drink riding bucking bull standing on a deck covered in marbles on a ship during a hurricane.
That's vivid and colorful, . Anyway,
Is there any workaround?