VirtualBox 7.2.6 processes hanging on Solaris 11.4.81

[ganchev]

Hello,

My host is running Solaris 11.4.81 and I've tried VirtualBox 7.2.4 and 7.2.6. Both have the same issue which makes VirtualBox unusable.
The /opt/VirtualBox/amd64/VirtualBox and /opt/VirtualBox/amd64/VirtualBoxVM processes never exit after powering off the VM and need to be killed manually.
The /opt/VirtualBox/amd64/VBoxHeadless process exits, though.
I have been using VirtualBox 7.1.x for a long time and there is no such problem.
The CPU on the host is Intel Xeon E5-1620 v4.

I performed a test on a different computer with an AMD Ryzen CPU inside a VMware Workstation VM using nested virtualization.
I did a clean installation of Solaris 11.4.81, installed the solaris-desktop package and then installed VirtualBox 7.2.6.
I found exactly the same issue as on my server: VirtualBox and VirtualBoxVM never exit.
The OS on my server is Solaris 11.4 upgraded from 11.3, that's why I decided to test on a clean Solaris 11.4.

[ganchev]

The same problem is still happening with VirtualBox 7.2.8.
I tested it on Solaris 11.4.81 and Solaris 11.4.90 hosts.

I wonder if any VirtualBox developers are checking the Solaris topics in this forum.
This is a serious issue and makes VirtualBox 7.2 unusable on Solaris hosts.
Now that VirtualBox 7.1 is no longer supported, I am stuck with an unsupported version.

[granada29]

You can't really count on the VirtualBox Developers to be monitoring these forums, which are largely end user supported.. I know some of the developers do participate from time to time, but there are no guarantees.

You would be better off reporting this problem through the issues tracker on github: https://github.com/VirtualBox/virtualbox/issues