Ubuntu 20.04 no longer starts in VM

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Zlotea Catalin
Posts: 6
Joined: 5. Mar 2021, 18:51

Ubuntu 20.04 no longer starts in VM

Post by Zlotea Catalin »

Hello,

I encounter the following problem: Ubuntu 20.04 no longer starts in VM.
A few days ago, it worked without problems, but it doesn't start today.
When I turn it on, the screen turns on and off for 30 seconds and then the error appears: "Oh no! Something has gone wrong. A problem has occurred and the system can't recover. Please log out and try again."
I tried to update Ubuntu, but it still doesn't start.
I mention that I haven't changed anything since the day Ubuntu started and until today when it doesn't work.

Can anyone help me solve the problem ?

Thanks
scottgus1
Site Moderator
Posts: 20965
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows, Linux

Re: Ubuntu 20.04 no longer starts in VM

Post by scottgus1 »

Zlotea Catalin wrote:Can anyone help me solve the problem ?
Sure. First, we move this to a forum more tuned to fixing things than "Suggestions" :wink:

Start the VM from full power off, not save-state. Run until you see the problem happen, then shut down the VM from within the VM OS if possible. If not possible, close the Virtualbox window for the VM with the Power Off option set.

Please right-click the VM in the main Virtualbox window's VM list, choose Show Log. Save the far left tab's log, zip the log file, and post the zip file, using the forum's Upload Attachment tab.
Zlotea Catalin
Posts: 6
Joined: 5. Mar 2021, 18:51

Re: Ubuntu 20.04 no longer starts in VM

Post by Zlotea Catalin »

Now when I tried to start Ubuntu it just turned on and off the screen and I didn't get any more errors.
I turned off Ubuntu with the Power Off option.

I am attaching the VBox.log file.
Attachments
VBox.rar
(27.75 KiB) Downloaded 109 times
scottgus1
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Re: Ubuntu 20.04 no longer starts in VM

Post by scottgus1 »

Zlotea Catalin
Posts: 6
Joined: 5. Mar 2021, 18:51

Re: Ubuntu 20.04 no longer starts in VM

Post by Zlotea Catalin »

Thank you !

Now Ubuntu is running again.
But so far why went with Hyper-V enabled ?
scottgus1
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Posts: 20965
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Primary OS: MS Windows 10
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Re: Ubuntu 20.04 no longer starts in VM

Post by scottgus1 »

That is a good question, I don't know. Maybe Microsoft pushed an update and changed something.
Zlotea Catalin
Posts: 6
Joined: 5. Mar 2021, 18:51

Re: Ubuntu 20.04 no longer starts in VM

Post by Zlotea Catalin »

I understand.

Thanks again for the help.
scottgus1
Site Moderator
Posts: 20965
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Re: Ubuntu 20.04 no longer starts in VM

Post by scottgus1 »

Glad you're up and running!
alluv
Posts: 1
Joined: 18. Feb 2023, 13:56

Re: Ubuntu 20.04 no longer starts in VM

Post by alluv »

scottgus1 wrote:Glad you're up and running!
Hi, I have the same problem but it seems the reason is not Hyper-V being enabled. Can you take a look?
Attachments
seed-ubuntu20.04 Secret-errorlog.zip
error log
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mpack
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Re: Ubuntu 20.04 no longer starts in VM

Post by mpack »

alluv wrote:the reason is not Hyper-V being enabled. Can you take a look?
Hyper-v is Microsoft's VM software, and is never required by VirtualBox. In fact having Hyper-v enabled pretty much guarantees that the VirtualBox experience will be terrible.

Happily, your log shows that, indeed, Hyper-v is not enabled - so keep it up!

The only big error I see in a quick glance at your VM is that graphics RAM is very low at only 28MB. I would increase this to 128MB.

Also the VirtualBox Guest Additions pre-installed by your Ubuntu distro are quite out of date. You need to purge the Ubunto GAs fork and install the real thing (see chapter 4 of the user manual).

Also a warning: your host has 16GB RAM installed but only had 3GB free when the VM was launched. Not a problem so far (the VM is configured to use 2GB), but it concerns me that you have a monster RAM hog in there somewhere - keep an eye on it.
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