Lubuntu 19.04 login screen doesn't appear when using vmwgfx

I'm running Lubuntu in a qemu 2.12.1 VM. 18.04 works fine.

When installing a fresh Lubuntu 19.04 or dist upgrade the 18.04 version the login screen doesn't appear anymore. Dropping to the console and typing `startx` launches the desktop successfully.

Ubuntu 19.04 does not appear to have this problem so it's Lubuntu specific. The bug resembles this bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1832138

I use login manager sddm.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-5.0.0-29-generic 5.0.0-29.31
ProcVersionSignature: Ubuntu 5.0.0-29.31-generic 5.0.21
Uname: Linux 5.0.0-29-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Thu Sep 19 23:03:33 2019
InstallationDate: Installed on 2019-09-19 (0 days ago)
InstallationMedia: Lubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
IwConfig:
 lo no wireless extensions.

 ens3 no wireless extensions.
Lsusb:
 Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
 Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-29-generic root=UUID=950d7990-c633-42e3-94c6-75c812e71528 ro quiet splash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.0.0-29-generic N/A
 linux-backports-modules-5.0.0-29-generic N/A
 linux-firmware 1.178.3
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Virtualization-2.4.0-11227-181219-0-g73d6e2e
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-2.2
dmi.modalias: dmi:bvnSeaBIOS:bvrVirtualization-2.4.0-11227-181219-0-g73d6e2e:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-2.2:cvnQEMU:ct1:cvrpc-i440fx-2.2:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-2.2
dmi.sys.vendor: QEMU