Shim 15+ includes the fix for this chainloading trick; you should now be able to chainload from:
tftp shim -> tftp grub -> disk shim -> disk grub
That shim 15+ version is in cosmic for now; pending more investigation into the relocation bug that was identified in bionic.
Shim 15+ includes the fix for this chainloading trick; you should now be able to chainload from:
tftp shim -> tftp grub -> disk shim -> disk grub
That shim 15+ version is in cosmic for now; pending more investigation into the relocation bug that was identified in bionic.