crash in vb 6.1.36 r152435 (Qt5.6.2)

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kcris
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crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by kcris »

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
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multiOS
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by multiOS »

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.
scottgus1
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by scottgus1 »

Another thing to try is to temporarily switch the VM to USB 2, while the VM is fully shut down.
fth0
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by fth0 »

kcris
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Joined: 7. May 2021, 10:33

Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by kcris »

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!
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kcris
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by kcris »

any idea? who could help? thanks
fth0
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by fth0 »

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.
kcris
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by kcris »

@fth0 ok, thanks!
kcris
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by kcris »

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
fth0
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Re: crash in vb 6.1.36 r152435 (Qt5.6.2)

Post by fth0 »

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