VM screen flickers during booting until I'm completely logged in on the win7 vm

[backes]

I'm running VirtualBox-5.1-5.1.10_112026_fedora25-1.x86_64 on Fedora 25 with win7 as guest. My problem: If booting the VM (full screen mode), the screen flickers rhythmically (about 1 Hz freqency) until I'm completely logged in with my win 7 account.

Only a very few times the VM boots flawlessly.

This effect is new, no such effect on Fedora25 as host with my previous Vbox version VirtualBox-5.1-5.1.8_111374_fedora24-1.x86_64. Going back to this version will help as workaround.

My current F25 kernel is 4.8.13-300.fc25.x86_64, but same problem with previous F25 kernels.

Anybody sees such effect too?

Any comments are welcome.

Kind regards

Joachim Backes

[backes]

What I forgot to report:

1. The reported behaviour happens inside a Gnome/Xorg or Gnome/Wayland session.
2. No such behaviour if VirtualBox is started inside a Mate session.

Joachim Backes

[Michael Thayer]

Please attach a log file as described in the bug reporting instructions<1>. Would you be willing to do some bisection to see where the problem started? Did you reinstall the Guest Additions when you went back to version 5.1.8 to test? (If you did not then that would suggest that the Guest Additions are not related to the problem, which is what I would expect.) Would you be willing to bisect builds (using a shell script installer, as we can't provide Fedora 25 RPMs for bisection) to find the problem?

1. https://www.virtualbox.org/newticket

[backes]

~/.config/Machines/win7/VBox.log