From: David Woodhouse If a Xen console is configured on the command line, do not add a default serial port. Fixes: 1bec1cc0da4 ("ui/console: allow to override the default VC") Signed-off-by: David Woodhouse --- (Bonus points for adding a Xen console by default for Xen guests instead of a serial port, but I'll look at that for 8.3.) Without this, the example command lines in the documentation at https://qemu-project.gitlab.io/qemu/system/i386/xen.html fail: $ ./qemu-system-x86_64 --accel kvm,xen-version=0x40011,kernel-irqchip=split \ -display none -chardev stdio,mux=on,id=char0,signal=off -mon char0 \ -device xen-console,chardev=char0 -drive file=${GUEST_IMAGE},if=xen qemu-system-x86_64: cannot use stdio by multiple character devices qemu-system-x86_64: could not connect serial device to character backend 'stdio' Maybe that Fixes: tag is a little harsh; I think the two pull requests were outstanding at the same time... but mine was pulled first :)  system/vl.c | 1 +  1 file changed, 1 insertion(+) diff --git a/system/vl.c b/system/vl.c index 5af7ced2a1..8109231834 100644 --- a/system/vl.c +++ b/system/vl.c @@ -198,6 +198,7 @@ static const struct {      const char *driver;      int *flag;  } default_list[] = { +    { .driver = "xen-console",          .flag = &default_serial    },      { .driver = "isa-serial",           .flag = &default_serial    },      { .driver = "isa-parallel",         .flag = &default_parallel  },      { .driver = "isa-fdc",              .flag = &default_floppy    }, -- 2.34.1