virtualbox kernel panic not syncing attempted to kill the idle task

Discussions about using Linux guests in VirtualBox.
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viby
Posts: 2
Joined: 16. Feb 2023, 19:19

virtualbox kernel panic not syncing attempted to kill the idle task

Post by viby »

Virtualbox 6.1 on Windows 11, Dell XPS13 9360, 16 GB RAM, 2 TB SSD, running Linux 22.04 Guest
Used to work fine until two weeks ago.
Installed WSL2 (with Wayland GUI support), installed Linux 22.04, OMNeT++ 6.0.1, etc in WSL2
Restarted Virtualbox yesterday and got "kernel panic not syncing attempted to kill the idle task" (clean start from powered off machine)
Decided to update to Virtualbox 7.0.6 to see if there is an interoperability issue between WSL2 (with WSLg) and Virtualbox 6.1
I also have another Dell XPS13 laptop running both WSL2 (with WSLg) and Virtualbox 7.0 successfully
Same result (also for all advanced startup options on startup screen): "kernel panic not syncing attempted to kill the idle task".
Also checked (in BIOS) that virtualization is enabled
Log file and screenshot attached.
Any suggestions/questions are welcome, thanks!
Attachments
VitualBox_StartFailure_021623.zip
Startup failure log file and screenshot
(70.91 KiB) Downloaded 4 times
scottgus1
Site Moderator
Posts: 20965
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows, Linux

Re: virtualbox kernel panic not syncing attempted to kill the idle task

Post by scottgus1 »

Enabling WSL2 enables Windows host OS Hyper-V, which causes some issues. HMR3Init: Attempting fall back to NEM (Hyper-V is active)
viby wrote: see if there is an interoperability issue between WSL2 (with WSLg) and Virtualbox
Oooooh, yeah.... Long-term fight between the devs and Microsoft. They're getting ahead, though.

Try two processors in the VM.
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: virtualbox kernel panic not syncing attempted to kill the idle task

Post by fth0 »

scottgus1 wrote:Long-term fight between the devs and Microsoft. They're getting ahead, though.
Although I (think to) know what you mean, I'm not so sure who "They" are. :twisted:
viby
Posts: 2
Joined: 16. Feb 2023, 19:19

Re: virtualbox kernel panic not syncing attempted to kill the idle task

Post by viby »

Two CPUs in the VM worked. It seems that using one CPU (one thread in Intel terminology) may lead to security concerns, but two threads = one core (in Intel terminology) is allowed.
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