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22 paź 2020 · This is how I troubleshoot a non-starting Ubuntu in Virtual Box (assuming optimal settings for a virtual machine were already made): Make sure you had installed the most recent version of Virtual Box. Try a reboot by entering a TTY terminal (Host + F1) sudo reboot. Update the guest OS from TTY (Host + F1):
28 sty 2022 · When I start Ubuntu it will boot and begin loading then eventually a black screen with the Ubuntu logo on the bottom. It will usually stay indefinitely on this unless I hard reset it and boot the VM again.
11 lis 2020 · On virtualbox 6.0+ there's a UI to increase the storage size on file>virtual_media_manager, select properties of the disk you want to resize. move the slider or enter new value for increase the disk size. at this point your disk size storage is increase, but the black screen is still there.
30 paź 2020 · The virtual machine starts with a purple screen, with icons at the bottom, and then after a short while I get a bunch of options. I select "Install ubuntu", then I get a black screen with an underscore.
23 kwi 2022 · While I was able to install Ubuntu, boot it, and load the Ubuntu homescreen/desktop, the sidebar was missing, the mouse didn't work, and none of the buttons in the top menu bar were clickable. The problem came from following Ubuntu's instructions that say to change the graphics-controller in the VM settings from the default VMSVGA to VBoxSVGA.
14 paź 2022 · I just resized my Ubuntu VM Disk space cause it was running low on it. I did it in the VirtualBox GUI but after resizing I couldn´t fully boot ubuntu anymore. A blackscreen stays after the loading icon and ubuntu title on the bottom of the screen.
The Ubuntu VM doesn't just have a black screen, it seems to be making no attempt to boot at all. The VM however is running just fine, waiting for Ubuntu to spring to life. I think you should treat this as an Ubuntu corrupted boot sectors problem and run the appropriate boot repair tools.
