1. Reproduce the blank screen again and then immediately reboot. So the
blank screen was the last issue near the end of the system log...

2. Now log in any way that avoids the blank screen so you can open a
terminal and run:

   journalctl -b-1 > prevboot.txt

3. Attach the file 'prevboot.txt' here.

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  [virtio] Xubuntu 20.04 - Blank screen after login

Status in xorg-server package in Ubuntu:

Bug description:
  Both on Xubuntu 20.04 23rd March and 24th March daily build.
  Using Martin Wimpress QuickEMU setup.
  Installation part of xubuntu is working fine.
  But after install and reboot, you get the login box. I type in the password 
for the user and then just get a black screen and mouse cursor, no other error 
boxes or gui.
  Have tested my QuickEMU setup on ubuntu-mate and do not see this issue, only 
on Xubuntu daily builds do I see this issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
  Uname: Linux 5.4.0-18-generic x86_64
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  Date: Tue Mar 24 16:40:12 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
   Red Hat, Inc. Virtio GPU [1af4:1050] (rev 01) (prog-if 00 [VGA controller])
     Subsystem: Red Hat, Inc. Virtio GPU [1af4:1100]
  InstallationDate: Installed on 2020-03-24 (0 days ago)
  InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200324)
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
   Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Keyboard
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 5000M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 480M
       |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 
       |__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-18-generic 
root=UUID=4b1c21e9-1325-435b-9ade-04263b901e6d ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install) 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-4.2
  dmi.modalias:,2009):pvrpc-q35-4.2:cvnQEMU:ct1:cvrpc-q35-4.2: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-4.2
  dmi.sys.vendor: QEMU
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.100-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.0-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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