Booting - Grub - show menu - Ubuntu 18.10


I’ve configured my PC to use the ubuntu-mate theme, when starting PC, via the Grub Customizer.

After upgrading to Ubuntu MATE 18.10:

  • starting PC shows a grey / black screen
  • no possibility to press ENTER in order to speed up the boot process

Solution for my PC:

  • start Grub Customizer
  • switch to Appearance settings (see image below)
  • click advanced settings
  • double-click the GRUB_TIMEOUT_STYLE setting
  • type menu
  • click somewhere outside of the field
  • click Close
  • click Save in the Grub Customizer window
  • restart PC

Result: Grub will display the set-up theme.

Hope this helps.