[Buildroot] Boot process stuck at "GRUB loading.." since 2021.02.1

[Walter, Stefan]

Hi,

the following used to work until Buildroot 2021.02, i.e. the resulting image booted normally. Ever since Buildroot 2021.02.1 and up until 2021.02.5, the resulting image does not boot any more - the boot process either gets stuck right after displaying "GRUB loading..", or it reboots at that point, leading to an infinite boot loop.

What I'm doing:

1. Run Buildroot to create a root partition image (my_defconfig attached).
2. Create a GRUB image like this (grub_early.cfg attached):

/path/to/buildroot-sdk/host/bin/grub-mkimage --config=grub_early.cfg --directory=/path/to/buildroot-sdk/host/lib/grub/i386-pc -o ./genimage_input_tmp/grub_core.img --format=i386-pc --prefix==/boot/grub biosdisk part_msdos ext2 normal linux configfile

3. Create a home partition image like this:

MKE2FS_CONFIG=/path/to/buildroot-sdk/host/etc/mke2fs.conf /path/to/buildroot-sdk/host/sbin/mke2fs -d home_partition_prep/home -j -L home -t ext3 -U random -b 4096 ./genimage_input_tmp/home.ext3 25M

4. Create a disk image like this (genimage.cfg attached):

/path/to/buildroot-sdk/host/bin/genimage --loglevel=1 --config=genimage.cfg --inputpath=./genimage_input_tmp --outputpath=images --rootpath=home_partition_prep --tmppath=./genimage_tmp --tune2fs=/path/to/buildroot-sdk/host/usr/sbin/tune2fs --e2fsck=/path/to/buildroot-sdk/host/usr/sbin/e2fsck

Does anyone have any idea what's going wrong here since 2021.02.1?

Best regards,
Stefan
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