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320 questions with no upvoted or accepted answers
5 votes
2 answers
8k views

Ubuntu VM hangs in VirtualBox under Window 10: "watchdog BUG: soft lockup - CPU#0 stuck for 23s"

This is Windows 10 with VirtualBox installed and Ubuntu virtual machine with Apache server. Often CPU hangs on the Ubuntu virtual machine, taking up to 50% host CPU usage with no response at all, when ...
Esamo's user avatar
  • 151
5 votes
1 answer
2k views

How can I emulate Ubuntu 18.04 on MacOS using qemu?

How can I run Ubuntu 18.04 on my MacBook Air (Mojave) using QEMU? (yes I have to use QEMU for now.) I got QEMU from here. But also got it from Homebrew as well. I've tried looking at the QEMU's ...
Bob th's user avatar
  • 151
5 votes
0 answers
2k views

virtualbox windows 10 guest stuck at low resolution on ubuntu host

I am running Ubuntu 14.04 as a host and Windows 10 as a guest in Virtual Box. I used Windows 8.1 as the operating system type when I set up the box. Windows 10 runs fine. I was able to install Guest ...
Matthew Griessler's user avatar
4 votes
1 answer
14k views

Can't drag-drop from Windows 10 to Ubuntu VirtualBox machine

Trying to drag/drop (or copy/paste) files or folders from my Windows-10 (x86-64) machine to an ubuntu VirtualBox machine. It does not work. My VirtualBox version is: 5.1.26 r117224. Guest machine is ...
user avatar
4 votes
0 answers
2k views

Simplest way to setup my own remote private git server

First of all, I've read all the git-server-setup documents on the internet, but still, there is one thing missing -- I want to setup a simple GIT server in (Ubuntu) Virtual Machine for myself, not for ...
xpt's user avatar
  • 8,851
3 votes
0 answers
1k views

Running Both Virtualbox and Android Virtual Device Manager on Ubuntu

Both Virtualbox and Android Studio's Android Virtual Device Manager (AVD) needs to be able to run on my Ubuntu 20.04 machine containing AMD Ryzen 3950X. If KVM is disabled (such as by adding kvm_amd ...
Athena Wisdom's user avatar
3 votes
1 answer
587 views

Create a serial port between two VMs both running Ubuntu 18.04 while using a Windows OS

I am trying to debug a kernel that was complied on one of my VMs and that is now waiting for kgdb as I am now trying to socat the other VM, but it is not working. I know both VMs are talking to each ...
user avatar
3 votes
0 answers
3k views

No internet connection with bridge adapter

I had internet connection inside my virtual box but after not using it for over a week I am not having internet connection. (Similar question to the question posted on ask ubuntu) The things that ...
Tony Tannous's user avatar
3 votes
0 answers
479 views

Ubuntu VM won't run when assigned more than one CPU in Oracle VirtualBox

I've got a 64-bit ubuntu 16.04 VM running in Oracle VirtualBox 5.2.0 on a Windows 7 Pro host. The host has 12 physical cores (24 logical) so naturally I want to run my VM with more than one core! The ...
snark's user avatar
  • 273
3 votes
0 answers
1k views

Mouse and Keyboard not working on VirtualBox guest

I set up an Ubuntu virtual machine through virtualbox. Everything was fine until I troubleshooted copy/paste issues I was having. I solved those issues by running VBoxClient --clipboard in the ...
Spencer Rohan's user avatar
3 votes
1 answer
3k views

How to change number of cpu cores in VirtualBox virtual machine?

I have changed number of cpu cores with following command: VBoxManage modifyvm "Ubuntu_16_04" --cpus 4 When I check with vboxmanage showvminfo Ubuntu_16_04 --details I get: Number of CPUs: 4 ...
iWizard's user avatar
  • 163
3 votes
0 answers
195 views

How to recover from bad VBox Guest Additions build?

I'm using Ubuntu 14.04 (fully patched). Last week, the kernel took an update. So I [virtually] inserted the VBox Guest Additions CD and then proceeded to build it. I don't recall having any problems. ...
jww's user avatar
  • 12.3k
3 votes
0 answers
2k views

How to share VPN established in VMware guest VM with host

Is there a way to share a VPN connection which is established in a VMware guest running Windows 7 with the host running Ubuntu 14.04? I tried NAT and Bridge, but I cannot seem to access VPN endpoints ...
Passionate Engineer's user avatar
3 votes
1 answer
1k views

How to fix git network issue on Ubuntu in Hyper-V?

I've installed Ubuntu Server 18.04.2 on Hyper-V in Windows 10 Pro (Version 1809). And I setup the network using Default Switch. The git is the default one installed on the system with version 2.17.1 ...
vize_xpft's user avatar
2 votes
1 answer
329 views

How to stop a non-killable process on a Ubuntu VM running on windows 10?

On windows 10 I have a Oracle VM VirtualBox running with Ubuntu 20.04.5 and sometimes an application (started with sudo) just "hangs". I am not able to kill the job using kill -9 <...
Alex's user avatar
  • 442
2 votes
0 answers
5k views

VirtualBox guest doesn't boot up. I only get a black screen

I have a problem with my Virtual box. When I try to start a guest OS, it doesn't start and I get a black screen. I tried to disable Hardware Virtualization an 3D acelaration but the only thing that ...
ar1234a's user avatar
  • 21
2 votes
0 answers
1k views

Can sound output be enabled on UTM Mac m1

I have installed ubuntu on my UTM on Mac m1. When I go to the setting the ubuntu vm, I see that sound is not enabled. When I check the checkbox for sound hardware, I got multiple options for the audio ...
Jason's user avatar
  • 49
2 votes
0 answers
64 views

VMware bridged network, guest adapters down after state restore

Running Ubuntu guest inside a Windows 10 machine using VMware 16.1.2 Main issue is that after saving and restoring state, none of the docker container's are accessible anymore and their networking not ...
Arijoon's user avatar
  • 160
2 votes
0 answers
4k views

Black screen in Ubuntu VM prevents me from resizing it

Context While using my Ubuntu 20.04 VM, got the following warning Clicking Examine one can see the following In this case, the trash has only one file with 50,8 MB so while one could trash it, ...
Tiago Peres's user avatar
  • 1,447
2 votes
0 answers
1k views

Cannot connect to Hyper-V Ubuntu VM after update to 20.04

Over the weekend I decided (perhaps stupidly) to update my Ubuntu 18.04 VM to Ubuntu 20.04, and now I can't connect to it. The machine starts up ok in Hyper-V, but the connection just hangs on the ...
Dark Hippo's user avatar
2 votes
0 answers
525 views

Wired internet connection keeps dropping on Ubuntu 18.04 VM

So basically I set up LAMP stack on my PC with Virtual Box and Ubuntu 18.04 VM. Configured everything and it was working just fine for like a month now until it just randomly started dropping ...
unesic's user avatar
  • 21
2 votes
0 answers
3k views

Cannot access Ubuntu Samba share from Windows 10

Host: Windows 10 Guest: 2x Ubuntu 16.04 VM: Virtualbox Networking: host-only adapter I cannot use bridged mode because my company's network won't assign an IP address to the VMs. I set up Samba on ...
Bob's user avatar
  • 201
2 votes
2 answers
5k views

Virtual Box OS stuck with blank screen

I want to run Linux OS on my Windows machine as guest OS. To make it run, I have installed Oracle Virtual Box and Ubuntu ISO file. And I have configured it as follows: Ubuntu version: ubuntu-18.04.2 ...
Div's user avatar
  • 134
2 votes
1 answer
2k views

Why does my VirtualBox machine not have disk space when it is using a small portion of what I allotted it?

TL;DR: VirtualBox VM running Ubuntu doesn't seem to recognize virtual hard drive size. How to fix? FWIW, I used to run this same setup on VirtualBox 5.2 with Ubuntu 16.04 and MySQL 5.6 and never had ...
Mitchell's user avatar
2 votes
0 answers
733 views

How to RDP into remote Hyper-V Ubuntu VM that uses xRDP?

I have the special xRDP version of Ubuntu installed in Hyper-V and can successfully use Enhanced session. I setup the VM to use an External NIC that's bridged in Windows so it can get an IP from my ...
Sawtaytoes's user avatar
2 votes
0 answers
2k views

VirtualBox Ubuntu lags at 4K resolution on powerful PC

I'm running the latest Ubuntu on Oracle VirtualBox. When I keep the window at default small size, it runs almost as smoothly as the Windows 10 host. However, when I maximize the window, the lag ...
Tuomas Toivonen's user avatar
2 votes
1 answer
1k views

Bridged Adapter on Ubuntu Server 16.04 not working in VirtualBox guest running Windows 7

I have Ubuntu Server 16.04 with GUI (why? I'm lazy!). I have installed Oracle VirtualBox WorkStation 12, and have created a VM that I have installed Windows 7 on, but I cannot get networking to work ...
StuartM's user avatar
  • 21
2 votes
0 answers
1k views

Reinstall Ubuntu on remote machine

I have been renting VPS from provider that no longer offers servers in location I am interested with. This machine has Ubuntu 14.04 installed which was upgraded to 16.04. It was in heavy use which led ...
Jakub's user avatar
  • 53
2 votes
2 answers
2k views

Hyper-V Ubuntu can't connect to internet via external network adapter if it also has an internal network adapter

I have an Ubuntu 14.04 Server running as a Hyper-V VM. It has an external virtual adapter and an internal virtual adapter connected to it. The external adapter eth0 gets an ip from 192.168.1.x ...
poor_documentation's user avatar
2 votes
0 answers
2k views

Is it possible to autostart a VMware virtual machine in background as a Linux service in Ubuntu, and shut it down elegantly when Ubuntu shuts down?

The host is Ubuntu 14.04 LTS. I would like my virtual machine to start with Ubuntu in the background. I also hope the virtual machine can be shut down elegantly upon Windows shuts down. Is there any ...
bfrguci's user avatar
  • 525

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