Opened 7 years ago

Last modified 7 years ago

#17224 new defect

VM crashes after input switch with KVM switch

Reported by: Bernie S Owned by:
Component: host support Version: VirtualBox 5.2.0
Keywords: KVM abort Cc:
Guest type: other Host type: other


Simiar to Ticker #8004, but on a Mac OS X host.

To reproduce:

  1. Start VM, wait until it starts an X server. Guest additions don't need to be installed. Make sure VM has captured the mouse.
  2. Switch keyboard and mouse input to different computer with KVM switch (I'm using a SeaWit 4 port HDMI KVM switch).
  3. Switch input back to VirtualBox host
  4. Release the mouse from the VM and click another Window on the host to transfer focus.
  5. VM aborts.

I tried to capture a core dump, but for some reason I didn't get one. I followed the instructions here exactly: The terminal showed "Segmentation fault: 11" when the VM aborted.

Host is Mac OS X 10.11.6

Attachments (2)

VBox.log (65.1 KB ) - added by Bernie S 7 years ago.
VBox log
VirtualBox_2017-11-01-103923_bschelbe-mac-5.crash (72.7 KB ) - added by Bernie S 7 years ago.
Crash report

Download all attachments as: .zip

Change History (7)

by Bernie S, 7 years ago

Attachment: VBox.log added

VBox log

comment:1 by Bernie S, 7 years ago

Also confirmed that this is not a problem if the USB keyboard and mouse are connected directly to the VirtualBox host instead of through the KVM. Switching only the monitor with the KVM does not cause issues.

comment:2 by Bernie S, 7 years ago

Acutally, this doesn't have anything to do with the KVM switch. I can also replicate the problem by:

  1. Start VM, wait until X server starts, and VM has captured mouse.
  2. Unplug USB mouse.
  3. Plug USB mouse back in.
  4. Release mouse from VM and click another window to transfer focus.
  5. VM aborts.

comment:3 by Bernie S, 7 years ago

I was able to generate a core dump, but it's 435MB, compressed. I have a 512KB size limit on any attachments I add. The split command won't even split my file into that many chunks. Is there any way to change the attachment limit?

comment:4 by aeichner, 7 years ago

For starters the crash report of OS X for the VM might be sufficient to investigate this issue. The crash report should be small enough to be able to attach it.

by Bernie S, 7 years ago

Crash report

comment:5 by Bernie S, 7 years ago

Still an issue with version 5.2.2

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