As I have not hear anything yet, I thought I would summarize the current status for this problem. Please, let me know if any other tests or information are needed.
I am running qemu-system-x86_64 v5.2.0 (also tried v6.1.0 and top of master) on: - aarch64 (Jetson AGX Xavier) with Ubuntu 18.04.5 as a host (compiled from git sources as distro version for it was 2.11, which is too old), and on - x86_64 (my laptop) with Fedora 34 as a host (here the qemu-system-x86_64 distro version is 5.2.0). Running Ubuntu 18.04.6 server install cdrom (also tried Ubuntu 20.04.3) as the guest. The following services fail on the Jetson, but not on the laptop. The first one is the ttyS0 console, which seems the most important thing as it is provided directly by the virtual emulation (-serial mon:stdio): [ TIME ] Timed out waiting for device dev-ttyS0.device. [DEPEND] Dependency failed for Serial Getty on ttyS0. ... [FAILED] Failed to start Dispatcher daemon for systemd-networkd. <== network does start fine though. See 'systemctl status networkd-dispatcher.service' for details. ... [FAILED] Failed to start Wait until snapd is fully seeded. <== snapd runs fine though. See 'systemctl status snapd.seeded.service' for details. ... [FAILED] Failed to start Holds Snappy daemon refresh. See 'systemctl status snapd.hold.service' for details. [ OK ] Started Update UTMP about System Runlevel Changes. ... waits forever ... Note that the Jetson has 8 cores running at 2.25GHz, and this tests is run just after boot with no other user applications launched. I wonder if I need something in my build options or if I need to rebuild my kernel with some added kernel configuration options... Hopefully, some experts around here can help me with that if it is a known thing (I google around but other than mentioning that 2.11 is too old, could not find any clear reason about this problem). My build options for the Jetson (I did not do cross-compiling, as I was a bit unsure about pkg-config/glib-2.0 for build and host/target, so I compiled natively on the Jetson host machine, using a separate build folder): ../configure \ --target-list=x86_64-softmmu \ --enable-plugins \ --enable-attr \ --enable-auth-pam \ --enable-cap-ng \ --enable-curl \ --enable-gnutls \ --enable-kvm \ <== not available as an accelerator for Ubuntu host on Jetson --enable-libnfs \ --enable-libudev \ --enable-libusb \ --enable-libxml2 \ --enable-linux-aio \ --enable-nettle \ --enable-seccomp \ --enable-snappy \ --enable-spice \ --enable-usb-redir \ --enable-vde \ --enable-virtfs \ --enable-virtiofsd \ --enable-xkbcommon \ --enable-pie \ --enable-modules \ --enable-membarrier \ --enable-tools \ --enable-vvfat Installed as per the default prefix in /usr/local (the distro already have that in the path before the standard distro folders, so all runs as expected): $ which qemu-system-x86_64 /usr/local/bin/qemu-system-x86_64 Some things like the following could not be used due to current kernel or ubuntu packages available (perhaps I need to compile fuse from sources?): - --enable-libpmem (absent package, couldn't find the right one) - --enable-libssh (0.8.0 but >= 0.8.7 for libssh-4-dev) - --enable-fuse --enable-fuse-lseek (fuse2 available but fuse3 needed) - --enable-netmap (not in current kernel kernel, the required header only exists for newer kernels) I run it with the following command line on both Jetson and laptop: qemu-system-x86_64 \ -boot order=dc,menu=on \ -cdrom ubuntu-18.04.6-live-server-amd64.iso \ -nographic \ -serial mon:stdio \ -kernel ufm/vmlinuz \ -initrd ufm/initrd \ -append 'boot=casper console=ttyS0 ---' \ -m 16384 \ -drive file=ufm/ufm.fd0,format=raw,if=floppy \ <= empty image to avoid ubuntu complaining about fd0. -drive file=ufm/ufm.img,format=raw,if=ide \ -netdev bridge,br=virbr0,id=net0 \ -device virtio-net-pci,netdev=net0,id=nic1 \ -device usb-ehci,id=ehci The vmlinuz & initrd come from the ubuntu iso in the casper folder, the append uses what the grub configuration had for the normal default kernel in the iso. The virtual bridge works as expected with the right allow line in /usr/local/etc/qemu/bridge.conf and setting the qemu-bridge-helper u+s (plus a few extra packages). Anything else is as per the Ubunt u 18.04.5 (LTS) repos used by the host (I did not upgraded the packages, other than the packages needed to get the bridge working and the dev packages to compile the qemu on the aarch64). In the Jetson machine running Ubuntu 18.04.5 I get: $ uname -a Linux vpm-devkit 4.9.201-tegra #1 SMP PREEMPT Fri Jul 2 15:24:18 BST 2021 aarch64 aarch64 aarch64 GNU/Linux $ cat /proc/cpuinfo processor : 0 model name : ARMv8 Processor rev 0 (v8l) BogoMIPS : 62.50 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp CPU implementer : 0x4e CPU architecture: 8 CPU variant : 0x0 CPU part : 0x004 CPU revision : 0 MTS version : 51035886 ... 8 cpus ... $ sudo virt-host-validate QEMU: Checking if device /dev/kvm exists : FAIL (Check that CPU and firmware supports virtualization and kvm module is loaded) QEMU: Checking if device /dev/vhost-net exists : WARN (Load the 'vhost_net' module to improve performance of virtio networking) QEMU: Checking if device /dev/net/tun exists : PASS QEMU: Checking for cgroup 'memory' controller support : PASS QEMU: Checking for cgroup 'memory' controller mount-point : PASS QEMU: Checking for cgroup 'cpu' controller support : PASS QEMU: Checking for cgroup 'cpu' controller mount-point : PASS QEMU: Checking for cgroup 'cpuacct' controller support : PASS QEMU: Checking for cgroup 'cpuacct' controller mount-point : PASS QEMU: Checking for cgroup 'cpuset' controller support : PASS QEMU: Checking for cgroup 'cpuset' controller mount-point : PASS QEMU: Checking for cgroup 'devices' controller support : PASS QEMU: Checking for cgroup 'devices' controller mount-point : PASS QEMU: Checking for cgroup 'blkio' controller support : PASS QEMU: Checking for cgroup 'blkio' controller mount-point : PASS WARN (Unknown if this platform has IOMMU support) <= it does have IOMMU, I know for sure from playing with v4l2... LXC: Checking for Linux >= 2.6.26 : PASS LXC: Checking for namespace ipc : PASS LXC: Checking for namespace mnt : PASS LXC: Checking for namespace pid : PASS LXC: Checking for namespace uts : PASS LXC: Checking for namespace net : PASS LXC: Checking for namespace user : PASS LXC: Checking for cgroup 'memory' controller support : PASS LXC: Checking for cgroup 'memory' controller mount-point : PASS LXC: Checking for cgroup 'cpu' controller support : PASS LXC: Checking for cgroup 'cpu' controller mount-point : PASS LXC: Checking for cgroup 'cpuacct' controller support : PASS LXC: Checking for cgroup 'cpuacct' controller mount-point : PASS LXC: Checking for cgroup 'cpuset' controller support : PASS LXC: Checking for cgroup 'cpuset' controller mount-point : PASS LXC: Checking for cgroup 'devices' controller support : PASS LXC: Checking for cgroup 'devices' controller mount-point : PASS LXC: Checking for cgroup 'blkio' controller support : PASS LXC: Checking for cgroup 'blkio' controller mount-point : PASS LXC: Checking if device /sys/fs/fuse/connections exists : FAIL (Load the 'fuse' module to enable /proc/ overrides)
