Bug 2228847

Summary: missing root disk parameter with BIOS mode drops to emergency mode
Product: Red Hat Enterprise Linux 9 Reporter: Andreas Paul <xorpaul>
Component: grub2Assignee: Bootloader engineering team <bootloader-eng-team>
Status: CLOSED DUPLICATE QA Contact: Release Test Team <release-test-team>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: CentOS StreamCC: bstinson, echo, jwboyer, mlewando
Target Milestone: rc   
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Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2023-08-09 07:21:03 UTC Type: Bug
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emergency mode after first boot with BIOS mode VM none

Description Andreas Paul 2023-08-03 11:51:21 UTC 
Created attachment 1981470 [details]
emergency mode after first boot with BIOS mode VM

Description of problem:
After installing CentOS 9 Stream on a server with BIOS mode (non-EFI) the first boot after the successful installation does end up in the emergency mode caused the failed start of the initrd-switch-root.service
See also https://forums.centos.org/viewtopic.php?f=54&t=80316
The problem seems to have to do with grub as the /proc/cmdline does not contain the root parameter with the UUID of the disk when using BIOS mode, but still contains the kickstart from our automated installer parameters like inst.ks or ksdevice, like it was never updated.
This started happening around the latest release of the ISO and installer kernel on the 2023-07-27

Version-Release number of selected component (if applicable):
$ rpm -qa|grep grub
grub2-common-2.06-67.el9.noarch
grub2-tools-minimal-2.06-67.el9.x86_64
grub2-tools-2.06-67.el9.x86_64
grubby-8.40-63.el9.x86_64
grub2-efi-x64-2.06-67.el9.x86_64


How reproducible:


Steps to Reproduce:
1. Create VM or use hard-ware server with BIOS mode
2. Install CentOS using the latest ISO
3. Reboot system after installation

Actual results:
Drops to emergency mode shell with failed initrd-switch-root.service caused by missing /sysroot

Expected results:
Normal boot with ending in user login prompt

Additional info:
https://forums.centos.org/viewtopic.php?f=54&t=80316
Comment 1 echo 2023-08-07 15:33:41 UTC 
I ran into the same issue and it looks like the /boot/loader/entries/XXX.conf didn't install properly, same as bug 2227722
Comment 2 Marta Lewandowska 2023-08-08 15:41:38 UTC 
Hi,
There is a new build of grub with the patch reverted. If you could please try grub2-2.06-68.el9 to make sure that it works for you..?
Comment 3 echo 2023-08-09 01:37:18 UTC 
(In reply to Marta Lewandowska from comment #2)
> Hi,
> There is a new build of grub with the patch reverted. If you could please
> try grub2-2.06-68.el9 to make sure that it works for you..?

New iso is working on both VM and real hardware
Comment 4 Marta Lewandowska 2023-08-09 07:21:03 UTC 
Thank you for confirming! I am closing this one as a duplicate of 2227722, which I also just closed, since it's working now.

*** This bug has been marked as a duplicate of bug 2227722 ***