Installer hangs right after GRUB screen [Ubuntu 19.04]

I wanted to try Ubuntu 19.04 on my new ASUS UX533 laptop, but it miserably failed right after selecting "Try Ubuntu" in the GRUB menu.

- download the 64-bit PC (AMD64) desktop image and write it on a USB key with dd
- boot the laptop from the USB key
  => the GRUB screen displays Ok
- select "Try Ubuntu"
  => the GRUB screen disappears Ok
  => blank screen Ok
  => the system hangs there.... KO

Same problem when selecting any of the options in the GRUB menu, even the "Safe graphics" ones.

I suspected a problem with the NVidia GeForce MX150 graphics card, so I tried adding

  nomedeset
or
  nouveau.modeset=0

to the Linux command line, but it didn't work better.

I tried (found on the internet) adding
  dis_ucode_ldr to the Linux command line
and this worked!

But obviously we need a proper fix.