Description of problem:
If kernel command line parameters are added to "/etc/default/grub" and if the grub is rebuilt using grub2-mkconfig -o /boot/grub2/grub.cfg, it will never come into effect and will always fail.
Version-Release number of selected component (if applicable):
Observed on : RHEL 8.0 beta
Kernel version : 4.18.0-32.el8.x86_64
Grub2 version : grub2-pc-2.02-57.el8.x86_64
This issue can always be reproduced with 100% success rate.
Steps to Reproduce:
1. Fresh install RHEL 8 beta
2. Once the installation gets complete, edit "/etc/default/grub" and add kernel commandline parameters at "GRUB_CMDLINE_LINUX" line.
3. Rebuild the grub using grub2-mkconfig -o /boot/grub2/grub.cfg
4. Reboot the server and test.
The added parameters will never come into effect and the addition of parameters will always fail.
Added kernel command line parameters should work and they should come into effect.
*** This bug has been marked as a duplicate of bug 1651686 ***