Re-size VirtualBox Ubuntu Guest Window Causes Black Guest Screen Until Machine is Reset

[elyons]

System Information:

• Host: Windows 10 Enterprise:
• VirtualBox 6.0.4
• VirtualBox Extension Pack 6.0.4
• Guest: Ubuntu 18.04.2 (ubuntu-18.04.2-desktop-amd64.iso)
• VirtualBox Guest Additions: 6.0.4

Issue: Upon installation of the VirtualBox Guest Additions 6.0.4 in Ubuntu 18.04.2 whenever you attempt to re-size VirtualBox Ubuntu Guest Window Causes Black Guest Screen Until Machine is Reset.

Steps to Reproduce: I have tested this various times by performing the following:

1. Performing a fresh installation of Ubuntu 18.04.2 (ubuntu-18.04.2-desktop-amd64.iso) in VirtualBox with the following specifications:
   • Base Memory: 2048 MB (2 GB)
   • Processors: 2
   • Disk Space: 25 GB
   • Encryption Enabled: Yes (via the graphical Ubuntu installer prompts)

2. Navigating to “Devices -> Insert Guest Additions CD image”

3. Ran the VirtualBox Guest Additions 6.0.4 Install via the “Run” pop-up button

4. Received the “Please install the gcc make perl packages from your distribution.” error message

5. Ran the “sudo apt-get update” command per ​https://askubuntu.com/questions/1035030/virtualbox-guest-additions-installation-problem

6. Ran the “sudo apt-get install build-essential gcc make perl dkms” command per ​https://askubuntu.com/questions/1035030/virtualbox-guest-additions-installation-problem

7. Ran the “reboot” command per ​https://askubuntu.com/questions/1035030/virtualbox-guest-additions-installation-problem

8. Re-ran the VirtualBox Guest Additions 6.0.4 Install via the “Run” pop-up button

9. Attempted to re-size the VirtualBox Ubuntu Guest Window which created a black Ubuntu Guest screen

10. Navigate to “Machine -> Reset”

If I ever re-attempted to re-size the VirtualBox Ubuntu Guest Window then it would re-create black Ubuntu Guest screen

To resolve this issue I would manual uninstall VirtualBox Guest Additions 6.0.4 from the Ubuntu Guest via the Command Line Interface (CLI) by performing the following steps:

1) Ensure the “Guest Additions CD image” is still mounted to the Ubuntu Guest 2) Run the “sudo sh /<USERNAME>/media/<VIRUTALBOXNAME>/VBoxLinuxAdditions.run uninstall” command

Outcome: This issue needs to be resolved so that one can re-size the a Ubuntu 18.04.2+ Guest window

[Michael Thayer]

Please provide a log file for the virtual machine and the output of lsmod and journalctl run inside the guest.

[Michael Thayer]

Can you try creating a machine with the default settings (1024MB memory, one VCPU, default disk, no guest encryption) and do a minimal Ubuntu install? Then see if this still occurs? Please test with 6.0.6.