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[Bug]: Randoom guest crashes typing ctrl+c #779

Description

@msalvini-egf

Version

7.2.12

Host OS Type

Windows

Host OS name + version

Windows 11 PRO 25H2

Host Architecture

x86

Guest OS Type

Linux

Guest Architecture

x86

Guest OS name + version

Debian GNU/Linux 13 (trixie)

Component

Guest Additions/Shared Clipboard

What happened?

Behavior observed also with previous VBox versions and with other Debian based Linux guests (e.g. Ubuntu 22.04, Ubuntu 24.04).

Sometimes typing ctrl+c (to copy some text, or in a terminal to terminate a command) causes a guest UI crash, that results in a sudden closure of all graphics applications too.
After this crash, sometimes the shared clipboard continues to work (in both directions), sometimes it stops to work until a guest reboot is issued.

Attached also the journalctl (seems there is nothing strange). No kernel panics/oopses reported.

I use always the VM in full screen mode, if it could be helpful.

How can we reproduce this?

Not simple to reproduce. Probably the bug happens only after some automatic UI lock and user unlock, and probably only if the host did some suspends with the VM running. I tried to pause the VM just before the host goes to suspend (attaching to Windows events) but it does not resolve the issue

VBox.log

journalctl.log

Did you upload all of your necessary log files, screenshots, etc.?

  • Yes, I've uploaded all pertinent files to this issue.

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