Comment 23 for bug 1749393

i can confirm that focal-proposed package fixes problems for arm64 and armhf on hostarch amd64

note: tried ppa listed here which fixes for arm64 but breaks armhf: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1928075/comments/15

steps for installing proposed Package:

cat <<EOF >/etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list
# Enable Ubuntu proposed archive

deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -cs)-proposed restricted main multiverse universe
EOF

cat <<EOF >/etc/apt/preferences.d/proposed-updates
# Configure apt to allow selective installs of packages from proposed

Package: *
Pin: release a=$(lsb_release -cs)-proposed
Pin-Priority: 400
EOF

apt update
apt install qemu-user-static/focal-proposed

then build 2 bullseye-chroot (arm64 and armhf) including secondstage and no crash happens