System shows for several minutes a blinking cursor before Grub menu gets displayed

Solution Verified - Updated -

Issue

  • When booting a system in Legacy mode (not UEFI), the screen shows a blinking cursor for a long time (up to several minutes) before Grub menu gets displayed
  • After selecting the Grub menu entry, the screen shows a blinking cursor for a long time again then kernel boots normally

Environment

  • Red Hat Enterprise Linux 7 and later
    • Legacy mode

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