VM crashes after input switch with KVM switch

[Bernie S]

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: https://www.virtualbox.org/wiki/Core_dump. The terminal showed "Segmentation fault: 11" when the VM aborted.

Host is Mac OS X 10.11.6

[Bernie S]

VBox log

[Bernie S]

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.

[Bernie S]

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.

[Bernie S]

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?

[aeichner]

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.

[Bernie S]

Crash report

[Bernie S]

Still an issue with version 5.2.2