OCI: Linux Compute Instance Boots to UEFI SHELL after Removing shim Package

APPLIES TO:

Oracle Cloud Infrastructure
Linux x86-64

Symptoms

After removing the shim package from an Oracle Linux compute instance to resolve a package conflict encountered during a yum update and the instance fails to boot normally and drops into the UEFI SHELL environment instead of loading the operating system.

UEFI Interactive Shell v2.2
EDK II
UEFI v2.70 (EDK II, 0x00010000)
Mapping table
      FS0: Alias(s):HD0a1b:;BLK1:
          PciRoot(0x0)/Pci(0x4,0x0)/Scsi(0x0,0x1)/HD(1,GPT,75E4084C-2D4A-4045-A4DE-0733B6DD7403,0x800,0x64000)
     BLK0: Alias(s):
          PciRoot(0x0)/Pci(0x4,0x0)/Scsi(0x0,0x1)
     BLK2: Alias(s):
          PciRoot(0x0)/Pci(0x4,0x0)/Scsi(0x0,0x1)/HD(2,GPT,0C5B3565-B489-4589-A861-184D0C5AEA2A,0x64800,0x1000000)
     BLK3: Alias(s):
          PciRoot(0x0)/Pci(0x4,0x0)/Scsi(0x0,0x1)/HD(3,GPT,AC2EE1D3-5D95-43EB-87D8-202F3CD6218D,0x1064800,0x4CC2000)

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