VirtualBox

Opened 3 years ago

#20762 new defect

VM crash after KVMS switch

Reported by: Harry M Owned by:
Component: USB Version: VirtualBox 6.1.30
Keywords: usb crash kvm switchbox Cc:
Guest type: Linux Host type: Linux

Description

See https://forums.virtualbox.org/viewtopic.php?f=7&t=104891&sid=51cd5f0216603e8bec8562fd1da4b3bc for more information.

Environment:

I have multiple PCs connected by a keyboard-video-mouse-switch (KVMS, to clearly distinguish from kvm, the kernel virtualization subsystem). The KVMS is a FJGear USB2.0 HDMI KVM model FJ-401HUA. I will refer to these PCs as A, B, and C. All 3 boxes are hosting Devuan Beowulf, and all VMs running on all boxes are running Devuan Beowulf Ascii, Beowulf, or Chimaera under virtualbox 6.1.30. All hosts are running the latest virtualbox extensions, and guests are running the latest virtualbox guest additions.

Description of the Problem:

The problem is that switching between two of these boxes causes a VM running USB 3 to crash. After an initial switch from A to B and back to A, one VM running USB 3 on A had crashed. In one instance, switching a second time after this from A to B and back to A, all but one VM running USB 3 had crashed and even a VM running USB 2 had also crashed.

Detail:

I run virtualbox on PCs A and B. I use PC A for most of my regular activities; B and C are "test" boxes. However, despite B being a testbox, I do have the VMs on B networked together with some of the VMs on A. The 3 PCs are networked through an electronic ethernet switch.

The KVMS does work, although there is a bit of a wait for the video to re-sync after a switch. The KVMS is capable up to 1920x1080, which matches my monitor's resolution. Normally, I don't notice any peculiar behavior related to using the manual buttons on the face of the unit. There are some messages logged after each switch, but they have never caused an issue until I changed the VM (the one that crashed) to USB 3.

I have attached the log for the crashed VM (see above link). These logs were created by saving them from the log dialog box in the virtualbox GUI. I have not modified them other than to obfuscate private information. The logs are cut short for some reason, but it is NOT related to the obfuscation script. I can save the logs again, from the GUI again, and the same results occur. The line counts of the log files match before and after obfuscation.

Attachments (1)

myvm-2022-01-04-23-57-04.log.gz (25.0 KB ) - added by Harry M 3 years ago.
VM crash after kvms switch

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Change History (1)

by Harry M, 3 years ago

VM crash after kvms switch

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