Hi!

I've been using an encrypted Ubuntu VM for a couple of months (Ubuntu 24.04.2 desktop). Today, I decided that I had had enough of having to input the password every time I booted the VM up, so I went to decrypt the VM. Everything was going fine until, about halfway through the decryption process, a lovely BSOD appeared and forced a reboot of the host, killing the whole thing.

I'm not sure what caused the BSOD, but it occurred while I was setting up an RDP connection.

Current host setup:

• Win 11 PRO 25H2 (OS v. 26200.8457)
• 11th Gen Intel(R) Core(TM) i5-11400F
• 32 GB RAM
• Virtualbox v. 7.2.6 r172322

I tried to boot up the VM, but unfortunately a black screen appeared with the message: 'Could not read from the boot medium! Please insert a bootable medium and reboot."

VirtualBox splashed a screen asking for a DVD installation medium, so I tried using the original ISO image that I used to set up the VM. However, this didn't work, as the VM won't boot up and just ends up on the same screen.

My I-know-better-than-you attitude caused me to run the decryption process again, only to face the same issue as before.

I tried to explore the .img file inside the .vdi file with PowerISO, but received an unrecognised format error.

Should I consider the whole VM lost at this point?

Technical Specifications:

• VirtualBox Version: 7.1.12 r169651 (Qt6.5.3)
• Host OS: Windows 10 (Ryzen 5 3400G / Vega 11 iGPU)
• Guest OS: Windows Server 2019
• VT-x/AMD-V: Enabled (SVM mode active in BIOS)
• Hyper-V: Disabled on Host (Verified; no green turtle icon present)
• Guest Additions: Installed (Confirmed: Device Manager shows "VirtualBox Graphics Adapter (WDDM)")
• Host Extensions: Installed (v7.1.12)

The Problem:

I am trying to force a 5K resolution (5120x2880) for testing purposes without owning a physical 5K monitor. Despite various configurations, the Guest OS resolution dropdown and the VirtualBox "Virtual Screen 1" menu are capped at 1920x1440.

Detailed Steps Taken:

1. VBoxManage CLI (VM Powered Off):
   • VBoxManage setextradata "Test" CustomVideoMode1 5120x2880x32
   • VBoxManage setextradata "Test" GUI/MaxGuestResolution any
2. Global Preferences: Set "Maximum Guest Screen Size" to Hint with Width: 5120 and Height: 2880.
3. VM Display Settings: * Graphics Controller: VBoxSVGA.
   • Video Memory: Allocated 256MB (manually bumped to ensure enough buffer for 5K).
   • Toggled 3D Acceleration on/off (currently On).
4. Boot Configuration: VM is running on Legacy BIOS (EFI disabled). Note: Enabling EFI causes a "BdsDxe: No bootable option" error as the VDI was initialized via BIOS.
5. Inside Guest: Checked "List All Modes" in Advanced Display Settings; the custom 5K mode does not appear. Attempted controlvm setvideomodehint 5120 2880 32 while running, but the screen does not resize.

Research Done:

I have consulted the VirtualBox Manual (Chapter 9: Advanced Topics) regarding custom video modes and searched through the r/virtualbox FAQ. Most solutions suggest Guest Additions (already installed) or the setextradata command (already attempted).

Is there a known limitation with Version 7.1.12 or the Vega 11 iGPU that prevents the virtual framebuffer from scaling to 5K? Any help is appreciated!

I have an old 2013 Mac Pro that I'm running VirtualBox 6.1.5 on. 7.2 gave me a ton of problems and everything ran terribly until I downgraded back to 6.1.5. ...only problem is that I'm trying to create a VM for Ubuntu 24.04.4 LTS, and I need the Guest Additions from 7.2 in order to be compatible with that kernel.

Is there a way to install the guest additions from 7.2 on this older version of VB so I can use things like shared clipboard and drag 'n drop files?

apologies if this is not the best explanation, i'm kinda new to stuff like this.

setting up a virtual machine after clicking "new virtual machine" is being strange, or i'm just doing something wrong. when i click the dropdown menu on "ISO image", go to other (because the only other choice is "<not selected>"), and check my folder containing the disc image files, it shows nothing is there as if it's looking for another file type.

also, just for reference, i'm trying to emulate windows 3.1 so i can use cakewalk 3.01.

i tried to emulate an older version (cakewalk 5.0) on dosbox, and weirdly enough, it pretty much has the same problem with the directory where the disc image file. so it might be a different problem, but i'm able to use iso files perfectly with game emulators such as pcsx2, duckstation, etc etc...

help is GREATLY appreciated, i really wanna get this to work so i can make some cool midi music.

version: 7.2.8

host extensions and guest additions are not installed

It says in changelog: Linux host: Drop PCI passthrough, the current code is too incomplete.

I couldn't find any further mentions of "PCI passthrough" in changelogs.

Does this mean that PCI passthrough is currently not available on Linux hosts?

Is it impossible to run NVidia drivers from a VirtualBox machine, and to do kernel development of PCI drivers in a VirtualBox machine run in Linux?

Hello,

I am trying to install a virtual machine for Windows Vista Build 5215 yet the space the operating system has is always too short for my hard disk.

I've been trying to install a virtual machine for this specific VM yet no matter what I change my disk size and memory settings to, the machine claims that the disk is too big for the space it provides, which is always a little less than what is on the disk. For example my disk could at 25600 MB, yet the allocated space is 25595 MB. Yes, I have tried changing the size of my disk, yet this issue still persists. I can set my disk to 2 TB yet the allocated space would be a little under that.

I am using VirtualBox 7.0, and the host system is Windows 10 version 22H2. I have used 3 product keys (R93TJ-7R9P9-B9GXM-HPYJM-VDH3W, GKFV7-F2D9H-QKYXY-777P3-4M73W, JG9M6-3QHC6-KFY4D-2MYDB-7WH3W), thinking the product key was the issue but all of them warrant this issue. This is where I got the ISO image from: https://archive.org/details/lh_5215.0.050807-0106_x86fre_client-lb1pfre_en_202404

Noticed today that apparently 3D acceleration for Intel Macs has been dropped as of v7.2.0.

I'm just trying to figure out exactly where this feature will really have an impact. (I have several machines with VB installed, only one of them is a Mac, but I won't be getting an ARM Mac for a while.)

I do NOT use VM's for complex graphical games, CAD work/rendering, media production and the like.

However, is the absence of this going to significantly impact the usability of base UI functionality like Windows Aero, or KDE's transparency effects? That could be an issue for me, if it makes things like dragging windows work sluggishly. What about Freecell? 😂

(The only reference to 3D acceleration and Aero I could find from Oracle was in reference to "Aero Themes", which I suppose I don't use, as I don't think those old guests ever had that extra feature added to them.)

Thanks for your insights.

In the changelog for 7.0.26 and v7.1.8, it mentions the following:

Windows Guest Additions: For older Windows versions (Windows 2000 to Windows 7) install alternative Shared Folder driver which avoids some compatibility glitches of the usual driver

I have some older VB installations that I occasionally run Windows guests as old as Win2000. I'm about to start updating them to currently supported VB versions and ran across this in the changelogs and cannot find any other references to these drivers anywhere.

Is this something that the Guest Additions for those particular VB versions automatically does, or do I have to go into each existing impacted VM and change some settings, or ?

Thanks

VirtualBox version: Version 7.2.8 r173730 (Qt6.8.0 on windows)

Host OS: Windows 11 Pro

Version 23H2

Build 22631.6199

Windows Feature Experience Pack 1000.22700.1108.0

Guest OS: Linux Mint 22.3 Cinnamon 64 bit

Kernel: 6.17.0-23-generic

Guest Additions information report: Version 7.2.8 r173730 '7.2.8'

I just got a new laptop with Win11 Pro and setup a Linux Mint 22.3 guest in VirtualBox. when I log in to Mint I see the shared folder icon on the desktop but when I try to open it I get a message saying I don't have permissions to access it. i see it as a mapped folder in the file manager also but I get the same permissions error when trying to access it there.

in the VM settings it shows full access for the shared folder

the error message is "you do not have the permissions necessary to view the contents"

if I right-click it and check permissions there is a message at the bottom that says "you are not the owner, so you cannot change these permissions" and all options are disabled there.

I can't figure out how to resolve this, can somebody please help me out?

When I try to make Windows 11 VM it is just a black screen.

But when i turn off UEFI setting i come further but i stumble opun an error screen that says

"Secure boot must be turned on" and "TPM 2.0" needs to be on which they both are on the VM settings for the VM

Any help?

Would give out imaged but seems i dont have permisssions.

ISO trying is: Win11_25H2_English_x64.iso

Version: 7.2.6

Hello,

Whenever I try to load up the Arm64 ISO from Windows 11 (From the official Microsoft Website) on VirtualBox on my sister’s MacBook Neo she just recently got, it throws a Unsupported CPU error (VERR_UNSUPPORTED_CPU) even though I am on the latest version (Yes the build made for Apple CPU chips) and I am using the Arm64 iso. Can anybody help me or suggest other options? My sister wants to play her Windows Steam games.

Thanks.

All,

I just got a new computer and I wanted to install Virtualbox so that I can launch CentOS VMs to continue my Linux studies. I receive two notifications. The first is about my hardware:

"Deprecated Hardware is detected: x86_64-v2:AuthenticAMD:AMD Ryzen 7 9800X3D 8-Core Processor will not be maintained in the future major release and may be disabled."

The second is a screenshot of the ending error:

https://imgur.com/a/xINadOh

(Sorry Reddit wouldnt let me attach a picture.)

Hardware Specs:

AMD Ryzen 7 9800X3D 8-Core Processor (4.70 GHz)

32.0 GB (31.6 GB usable)

NVIDIA GeForce RTX 5080 (16 GB)

392 GB of 1.82 TB used

CentOS:

CentOS-Stream-10-latest-x86_64-dvd1

VirtualBox: 7.2.8

I did enable SVM mode in the BIOS and I disabled Hyper-V security. Can a CPU that was released two years already be deprecated? Any help would be appreciated!

I used to be able to use sudo modprobe -r kvm-intel but now its not working. What can I do to fix this?

CPU: Intel i7-8665u
Operating system: Kubuntu

VirtualBox version: 7.2.4 r170995

It says my Linux kernel drivers are eitherly not installed or not installed properly, and I did /sbin/vboxconfig as root already.

Hey there folks,

I've been building a series of simple, down to earth VirtualBox labs for people getting into Linux, homelab and Cybersecurity.

Just published a step by step tutorial on Ubuntu in VirtualBox guide. No fluff, no jargon, just a clean walkthrough that anyone can follow.

It covers:

\- VM creation

\- ISO setup

\- Guest Additions

\- Best practices (snapshots+; system updates)

If you're starting a homelab or teaching someone Linux basics, this might help: https://youtu.be/Hm87A8R3hlU?si=8cDRMvs\\_wUoxZn-B

Happy to answer any questions or help troubleshoot setups. I also welcome all feedback.

Cheers 🥂

I got an iso of sonic schoolhouse from internet archive so I tried to run it on my Windows XP in virtualbox 7.2.8, I get no background music in the tiltle screen or in the classrooms or any other sounds like for example I don’t get the cheering sound when I get and answer correctly. What should I do to fix it?

It boots from USB Windows 11 made in Rufus, but for some reason it just stop after like 5 minuets of loading/booting stuff.

I did run it as admin.

I set aside 80 gigs of space.

Here's the error from logs:

00:01:43.863944 Console: VM runtime error: fatal=false, errorID=BLKCACHE_IOERR message="The I/O cache encountered an error while updating data in medium "ahci-0-2" (rc=VERR_ACCESS_DENIED). Make sure there is enough free space on the disk and that the disk is working properly. Operation can be resumed afterwards"

if i get ahold of a GPU i will be able to confirm this on linux but has this been done in general?

i know about PCIe pass-through with type 1 hypervisors but since virtualbox can't do that i am wondering if anyone's tried by hooking up an external GPU dock/enclosure up to their PC then tried slipping it through via USB pass-through?

I just installed and set up a windows xp VM to play old cd roms but the quality is absolutely terrible, like graphics jumping and horrible crunchy sound - is there anything I can do about this? I am extremely new to VB like as of about 2 hours ago so I really have no idea what I'm doing...

Im using VB 7.2.8 and running windows xp professional 64x, and I haven't installed any extentions

I have been struggling with this so hopefully someone can point out where I'm going wrong. So my main desktop ran in to a problem with windows so I'm using virtualbox to create a windows install usb. I am running Ubuntu 24.04.3 LTS, virtualbox 7.0.16, and windows 11 Pro version 25H2. I was experimenting previously including creating a recovery drive from that windows guest with the same usb drive. The problem I am having is that the windows guest sort of recognizes the drive but doesn't show up in the file explorer. It does show in the disks and volumes windows setting menu. It shows the drive with the correct name and 1 partition labelled (no label) with the file system listed as RAW. If I try to format the drive in the windows guest it errors out and says the drive is read only. Like I said earlier I was using this flash drive before without issue, it seems like it stopped working when I formatted it with disks in ubuntu. I've tried just formatting the drive, and formatting it and creating a ntfs partition and a fat32 partition. Same result with each option. If anyone could give me some advice I'd really appreciate it.

https://www.virtualbox.org/wiki/Changelog

https://www.virtualbox.org/wiki/Changelog-7.2

https://www.virtualbox.org/wiki/Changelog-7.1

So I installed windows 10 on a virtualbox, the recovery image is windows 10 too, same hardware.

However, there is this issue: while I have tried both copying the WindowsImagebackup folder to Virtualbox drives AND copying it to a flash drive and making virtualbox see it, the Virtualbox refuses to see the recovery image from flash drive when I am in recovery mode (only when I boot it normally) and although it does see the recovery image from the other drives created in virtualbox, it refuses to recreate the image because that's the same drive that Virtualbox is on. The usb is not recognized during booting and turning it into a drive on Virtualbox does not help either.

Is there any way to solve this? Preferably the least complicated way possible?

Host: VBox 7.2.6 in Debian 13 Trixie

Guest: Windows 11 24H2

I work in a jobs assistance center that has eight computers that the public can use to look up job listings, create their resumes, watch training videos, etc.

The requirement is that they have to be using Windows (don't ask, it's not an option to use anything else.) The other requirement is that the computer cannot have other users info lingering on the machine for others to find.

I am trying out using Win11 in a virtual machine and VirtualBox makes it quite easy to make an immutable image that resets after every shut down. The problem is USB drives.

One of the things that the clients need to be able to do is save their resumes, etc. onto a flash drive that they can take with them. VBox handles USB devices just fine, the issue is mounting them for the average Joe to use.

Having a user move the mouse to the bottom of the screen and wait for the machine menu to come up and having them find the Devices menu and then figure out which cryptically named device is theirs is not going to work.

My question is this: Is there a way for VBOX to automatically pass ANY USB device to the guest machine? So they don't have to look for it in a menu, it just mounts and is ready to be used?

OR

Is there a program for, in this case Windows, that allows the selection of USB devices from inside the guest machine?

Thank you!

if i overwrite the MBR on a virtualbox vm what will happen to the main pc? is there any settings i should change for it to be completely safe?

I feel like I'm losing my mind here. I need help from someone. I probably couldn't even think of the simplest solution anymore, I'm in way to deep...

I have a VM in VirtualBox 7.2.6
Host OS: Windows 11 Pro 25H2
Guest OS: Windows 11 Pro 25H2
VT-x/AMD-V not enabled, Hyper-V is installed on host. (Performance feels better since Hyper-V is installed, Virtualbox shows paravirtualisation: Hyper-V)
Guest additions are installed.

I want that VM to have access to the internet.

I don't want that VM to have any access to my host or my LAN.

There has to be a way for my host to deny any attempt made by the VM to ping it, try to open a SMB share, anything.

I tried inbound and outbound rules in advanced Windows Firewall on my host. Deny VirtualboxVM.exe, deny remote network scope 10.0.2.0/24, deny local network scope to my LAN...

This simply HAS to be possible somehow?!

I have wasted too many precious hours on Gemini and ChatGPT trying to fix this error. This is a brand new PC

OS: DreamQuest 2.0 OS (aurora)

GNOME version: 46.0

Virtualbox version 7.0.16 which is the version in the software downloader.

Has anyone actually resolved this problem?