virtualbox.org

Hi,
I am getting a crash when launching a kubuntu vm on my fresh win 11.
I am using wsl v1, hyperv was disabled.
I am also using extension pack in order to get usb 3 support. I suspect this one is the culprit.

Getting a null pointer (access 0x0000)

Anyone who can help? Thanks

There are a couple of VM configuration 'issues' you might want to adjust before looking deeper.

I would suggest:
- increase the CPU Cores from 1 to 2; and
- increase the VideoRAM from 33 MB to that maximum 128MB

1 cpu core is unlikely to be enough for a 64-bit OS, particularly if using the KDE Desktop; and 33 MB VRAM is probably insufficient to allow the size/resolution of the desktop display you will probably want/need.

Then re-start the VM and see if the problem is still the same. If there is still a problem, please attach the new vbox.log to your response.

Another thing to try is to temporarily switch the VM to USB 2, while the VM is fully shut down.

Same issue as Issue connecting USB storage to Win10 guest.

thanks guys, but no luck

increased video memory, cpu count, same null error

disabled usb 3, yes, no crash but usb 2 fails to attach my drives (and I do need those drives)

so moved back to usb 3, same null error, here are the new logs

thanks again!

any idea? who could help? thanks

As I already indicated, the issue is known, but there is no bugfix yet. As an alternative to several forum threads, you can also watch 21030 in the Bugtracker.

@fth0 ok, thanks!

to get usb 3.0 (via extension pack) without the crash,
a workaround for me was to downgrade to 6.1.34

I am now using this older version and everything works
VirtualBox-6.1.34a-150636-Win.exe

thanks

This issue should be fixed in the VirtualBox test builds 6.1.39r153816 and newer.