VM screen goes black

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phild
Posts: 26
Joined: 7. Aug 2016, 17:31

VM screen goes black

Post by phild »

This problem started after upgrading the host kernel to 5.17.15. The version of VB is 6.1.34

I have several VMs - an old WinXP seems to work okay, I have not tried the Win10 VM as I seldom use it however the two Kubuntu VMs (20.04) have this problem on both of the two host systems they run on. I can boot the Kubuntu VM and one of two things happen. It either 1) goes directly to a black screen or 2) goes to the login screen. If option two happens with host kernels 5.17.15 through 5.18.7 it was not possible to enter a password and after a few seconds the screen would go black. ACPI shutdown did not work and I have to close the machine. With kernel 5.18.8, both options still occur however I now appear to be able to input my password on the login screen but it then goes blank. With 5.18.8 I am now getting a error message in the VM window indicating that a module has closed unexpectedly. It is not the same module however being reported with each boot - so far, the modules reported have been Plasmashell, kde5 and Kwin_x11.

In order to be able to use the Kubuntu VMs, the host has to be booted with kernel 5.17.11.

Oh - the host OS is PCLinuxOS (fully updated)
fth0
Volunteer
Posts: 5668
Joined: 14. Feb 2019, 03:06
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Linux, Windows 10, ...
Location: Germany

Re: VM screen goes black

Post by fth0 »

The actual problem is that VirtualBox 6.1.34 and 6.1.97r150532 do not support Linux kernel 5.17.15 on the host and will produce random crashes in the guest (pun intended ;)). See 20914 and Windows 10 Guest on Linux host dies seconds after boot for details.

The VirtualBox test builds 6.1.35r151864 (and newer) are supposed to support Linux kernels 5.18, 5.17.12+, 5.15.44+, 5.10.119+ and more on the host and in the guest.
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