Crash of VirtualBoxVM 6.1.10 Ubuntu 18.04 guest on macOS 10.15.5 host after installing 6.1.10 guest additions

[Lars Sonchocky-Helldorf]

Hi,

I've got a crash of VirtualBoxVM 6.1.10 Ubuntu 18.04 guest on macOS 10.15.5 host after installing 6.1.10 guest additions. This crash occurs every time I try to boot up this VM right after entering the Login credentials into the guest. See attached log files

[Lars Sonchocky-Helldorf]

crash log of first crash

[Lars Sonchocky-Helldorf]

crash log of second crash

[Lars Sonchocky-Helldorf]

zipped Logs directory of crashed VM

[gombara]

As far I can see from the VBox logs the guest OS is linux and not using vmsvga graphics adapter. The crash happens in this case because of a bug that has been already fixed but will be available with the next release. Please switch to vmsvga and let us know if does not solve your problem. thanks

[Lars Sonchocky-Helldorf]

I uninstalled the guest additions like this:

• Switch to a console (Ctrl+Alt+F2).
• Make sure that the guest additions CD-ROM is inserted.

• Run the following:

sudo mount -t iso9660 /dev/cdrom /cdrom
sudo /cdrom/VBoxLinuxAdditions.run uninstall

Now that the guest additions are removed, I don't get a VM crash any longer right after logging in!

[Lars Sonchocky-Helldorf]

Now I'll make a snapshot, try to reinstall the guest additions again and see what happens after switching to vmsvga.

[Lars Sonchocky-Helldorf]

So I reinstalled the guest additions after making a snapshot and the VM crashes reproducibly again right after login.

Then I switched to VMSVGA but now I only got a black screen after logging in. Then I've send the shutdown signal to the VM and restarted it. After this I've got a normal graphical session again!

Thanks!

[Lars Sonchocky-Helldorf]

Today I updated to VirtualBox Version 6.1.12 r139181 (Qt5.6.3) and installed the guest additions in a Windows 7 VM. After a reboot I got a crash of Windows (not the VM itself) causing a Windows reboot in secure mode (e.g. without any additional drivers). A subsequent normal reboot caused a Windows 7 crash again (again the VM kept running) and so on until I switched from VboxVGA to VMSVGA for the graphics controller (like it was recommended for the Ubuntu VM before). This helped the cause.

Should I open a new ticket for this?

regards,

IOOI