All VM fails when changing dual monitor setup

[gyust]

Hello, here is what I get when I change the setup several times :

virtualbox --debug
Gtk-Message: Failed to load module "canberra-gtk-module"
Qt WARNING: QObject::connect: No such signal QApplication::screenRemoved(QScreen *)
Qt WARNING: QObject::connect: No such signal QScreen::availableGeometryChanged(const QRect &)
Qt WARNING: QObject::connect: No such signal QScreen::availableGeometryChanged(const QRect &)
Qt WARNING: QPainter::begin: Paint device returned engine == 0, type: 2
Qt WARNING: QPainter::end: Painter not active, aborted
Segmentation fault

All virtualbox VM crashes.

I'm running debian 8.7 with 4.9 linux kernel. 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus XTX [Radeon HD 8890M / R9 M275X/M375X] (rev 83) I'm using the radeon opensource driver. The dual monitor is working perfectly except for this issue.

[gyust]

This also happens every 3 suspend wake up cycle, also if you change the display setting with a dual monitor several times.

[gyust]

I'm still having the same issue with the version 5.1.16. My VM are crashing, maybe related to gnome-shell but this is very annoying and I can't trust Virtualboxany more for my professional usage.

[grazvi]

Same here with 5.1.18. Vbox crashes every time after windows host turn offs the monitors. I use 2 Dells connected via Display Port on Nvidia Quadro k2200. I use Debian with mate on guest. Non of this happens with 5.0.32 Vbox. Tahanks.

[Frank Mehnert]

I would like to get a core dump together with the information about which package (exact name please) is used on which Linux distribution. If you can provide a core dump on some URL where I can fetch it, please contact me via private email at frank _dot_ mehnert _at_ oracle _dot_ com.