After minimising full screen VM, on restoring only quarter of screen shown

[ximera]

On a Kubuntu host, when running a VM full screen, if I minimise the VM and then restore it, the VM stays in full screen mode but only about a quarter of it is shown.

In the attached screen shot you can see a Xubuntu guest part showing top left on a Kubuntu host.

The problem occurs both with Windows and Linux guest.

The problem has only occurred since the host upgraded to Kubuntu 17.10.

If I alternately minimise/maximise/minimise/maximise/.... on the maximise it alternately fails/works.

Bug originally reported on Launchpad #1731495

[ximera]

Screenshot showing partial Xubuntu guest on a Kubuntu host

[fener442]

Same problem for Virtualbox 5.2.12 on Ubuntu 18.04 running Windows 10 guest. Latest extention pack installed. Also my graphics card is Nvidia.

[kielein]

Idem with Vbox 5.2.10 + latest extension pack on Ubuntu 18.04 host and Ubuntu 16.04 guest. The graphics controller is NVIDIA Corporation GM204M [GeForce GTX 970M].

I noticed that the problem does not occur if I minimize pressing once the host key (to detach the keyboard from the guest machine) and then Alt+space for the container window's pop-up menu on which I choose the minimize option.

The problem does occur if the full screen guest windows is minimized by either clicking the minimize button on the mini toolbar or using the Host+M keyboard shortcut.

[mavelli]

5.2.20 here (r125587 on ArchLinux) with a similar problem with Windows 10 pro as guest.

if i have 3d acceleration enabled, the guest screen is shown as a mini version in the left top quarter of the guest window and the other 3 quarters are black. the mouse (with mouse integration on) however uses the whole guest window for input. once i disable the 3d acceleration, the issue dissapears. guest has guest drivers installed and up to date and all windows updates with state of 31. Okt. 2018

hardware is a AMD Ryzen 2700x with an Nvidia 1060 3GB and nvidia-dkms version 410.66-3

[PiranhaPhish]

Same problem with 5.2.20 with extensions 5.2.20r125813 on Ubuntu 18.04 with KDE (plasma/kwin 5.12.6). It happens with both Linux and Windows guests.

I have three monitors. I keep the guest fullscreen on my primary monitor (along with Plasma's panel, call it M1). After minimizing and restoring, the window will sometimes appear on the top of the monitor to the right (call it M2) and with only a portion of it visible. The portion of it that is visible has dimensions 1280×720; that width corresponds to the width of monitor M2, but that height seems arbitrary and doesn't correspond to any dimension of any monitor.

Furthermore, I typically keep M2 rotated 90° (for PDF viewing). When the guest inadvertently shows on that monitor while rotated, the dimensions are still 1280x720 just as when non-rotated, however it now bleeds over onto monitor M3 (to the right of M2) since the rotated width of M2 is now it's typical height of 1024.

Minimizing and restoring the guest again causes it to display properly on M1 again. Also, simply pausing and resuming the guest (Host+P, twice) fixes it as well.

[vicsanca]

Same here. Tested with xubuntu 18.04 as host and windows 10 and xubuntu 18.04 as guests. Tested with virtualbox 5.2.20 and 5.2.22 Tested with ATI FirePro v5800 and AMD RX 560. Always with same results. Video here: ​https://www.youtube.com/watch?v=BaDfjalz0g0&feature=youtu.be

[kundor]

I have the same problem with VirtualBox 5.1.34_Ubuntu r121010. The host is Pop!_OS 17.10, KDE 5, with integrated Intel graphics (i915 kernel driver, modesetting X driver).

The issue is reproducible 100% of the time:

1) While guest is full-screen, press Host+M to minimize

2) Click on entry in taskbar to restore: only the truncated upper-left corner appears over the host desktop. Clicks within this corner go to the guest; clicks outside that corner go to the host

3) Click on taskbar entry a second time to minimize again.

4) Click on taskbar entry a third time to restore again. This time it is full-screen.

[Lagan]

Vbox + GAs: 5.2.22, Host: Kubuntu: 18.04, Guests: Windows 10 1809 (OCT2018) and XP SP3

I can confirm the same VM restore issue in both Guests.

Thank you to PiranhaPhish for the simplest workaround "simply pausing and resuming the guest (Host+P, twice)" when you get the restore quarter window.

Hopefully the Oracle developers will come with a fix soon...

[vicsanc]

Bug still present in VirtualBox 6.0

[vicsanc]

And still present in VirtualBox 6.0.2

[ArtG]

I also observe this in VirtualBox 6.0.4 on Linux Mint 19.1 host and both Linux Mint 19.1 and Windows 10 guests. Using the Host Key +F key twice on the guest window usually corrects the problem.

[LINUXCPA]

I also observe this in VirtualBox 6.0.12 on OpenSuSE 15.1 host and Windows 10 guest. Reminimizing the screen and maximizes again restores to full size.

[gmiller]

Hi Guys,

This bug is exists a long time ago in the galaxy far far away ... I like Virtualbox, but this is the most irritating bug. I have update always if you release a new version, because I hope this bug not exists anymore, but I have failed. The Beta 6.1 is still contain this "feature".
PLEASEEEEEEEE, solve this issue ASAP! Best regards,

Gabor

[ximera]

I'm now running virualbox 6.1.10 on Kubuntu 20.04 and this seems to have been fixed.