How to start xorg in Arch Linux virtual machine running top of FreeBSD's bhyve?

I'm trying to start KDE Plasma and SDDM with virtualized Arch Linux. The host is FreeBSD running bhyve. Bootloader is UEFI. Looking at the virtual display with VNC connection with remmina (VNC viewer) ends with systemd log saying:

Reached target Graphical Interface.

but xorg doesn't launch and switch to graphical mode. Am I missing a driver or configuration or some bhyve-specific guest tools or kernel boot parameter? I've also installed tigervnc and when connecting to it with remmina KDE works just fine, so the virtual "physical" display seems to be the problem. /var/log/Xorg.0.log:

[   124.544] (EE) open /dev/dri/card0: No such file or directory
[   124.544] (WW) Falling back to old probe method for modesetting
[   124.544] (EE) open /dev/dri/card0: No such file or directory

lspci -vvvvvvvv:

...

00:1d.0 VGA compatible controller: Device fb5d:40fb (prog-if 00 [VGA controller])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- 

/etc/X11/xorg.conf:

Section "Device"
        Identifier "fb0"
        Driver     "fbdev"
        # PCI 00:1d.0, 0x1d = 29
        BusID      "PCI:0:29:0"
EndSection

$ pacman -Qsq xf86-video
xf86-video-fbdev
xf86-video-qxl
xf86-video-vesa