[Buildroot] qemu-aarch64 applications misbehaving

[Zeno Endemann]

Applications run under qemu-aarch64 are misbehaving for me. For example,
minimal (console only) Qt application are crashing on startup, and also the
BusyBox's "df" (disk usage) is printing out silly numbers. While I'm not
positive I suspect these are bugs in qemu.

I build the guest os using buildroot 2018.08.2,
qemu_aarch64_virt_defconfig, and running it as instructed (minus network,
don't need it):

qemu-system-aarch64 -M virt -cpu cortex-a57 -nographic -smp 1 -kernel
output/images/Image -append "root=/dev/vda console=ttyAMA0" -drive
file=output/images/rootfs.ext4,if=none,format=raw,id=hd0 -device
virtio-blk-device,drive=hd0

(Host os is Ubuntu 18.04, QEMU emulator version 2.11.1(Debian
1:2.11+dfsg-1ubuntu7.7))

Can someone confirm this? Any hints would be much appreciated.

While at it, another side question: Is there a reason why the
qemu_aarch64_virt_defconfig built kernel does not include the drivers for
qemu graphics emulation?

Thanks,
Zeno
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