[Buildroot] [Bug 15191] New: pc_x86_64_efi_defconfig doesn't run on real hardware

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=15191

            Bug ID: 15191
           Summary: pc_x86_64_efi_defconfig doesn't run on real hardware
           Product: buildroot
           Version: 2022.08.1
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: s.bristow at rocketlab.co.nz
                CC: buildroot at uclibc.org
  Target Milestone: ---

I have been trying to get a Buildroot image to run on an x86_64 machine but I'm
not having much luck. The generated image boots fine on QEMU but if I try to
run it on real hardware, I just get a blank screen after the GRUB menu.

I have tested running on a couple of different machines with the same result
and have confirmed that I can boot a standard Linux distro on the target
hardware successfully.

# Steps to reproduce
git describe:
2022.08.1-38-b44e2cf19a

make clean && make distclean 
make pc_x86_64_efi_defconfig
make -j(nproc)

# Running in QEMU (works)

qemu-system-x86_64 -bios /usr/share/ovmf/OVMF.fd -drive
format=raw,file=output/images/disk.img -m 4096M

# Running on Hardware (doesn't work)

* Flash image to USB stick
* Boot from USB stick
* UEFI works
* GRUB menu displayed
* Select boot option
* Blank screen, no further progress

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