[Solved] Black Screen

Discussions about using Linux guests in VirtualBox.
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Tune_Punch
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Joined: 19. Sep 2018, 17:03

[Solved] Black Screen

Post by Tune_Punch »

its my first time installing a virtual machine. is it normal to have this screen when running ubuntu?
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Last edited by socratis on 20. Sep 2018, 18:18, edited 1 time in total.
Reason: Marked as [Solved].
andyp73
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Re: Black Screen

Post by andyp73 »

No, it would be normal to see the usual Ubuntu desktop - assuming you have left it long enough to boot.

We will need to see the VBox.log file from the guest in question (zipped of course).

-Andy.
My crystal ball is currently broken. If you want assistance you are going to have to give me all of the necessary information.
Please don't ask me to do your homework for you, I have more than enough of my own things to do.
mpack
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Re: Black Screen

Post by mpack »

The subject matter of this topic is a Linux guest, and therefore does not belong in "Windows Hosts". Moving the topic to "Linux Guests". Please ensure that your chosen forum reflects the subject matter of the question asked. Yes, you may have a Windows host, but that is not inevitably true of everyone who should see this discussion.
Tune_Punch
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Joined: 19. Sep 2018, 17:03

Re: Black Screen

Post by Tune_Punch »

i think this is what you want andy
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socratis
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Re: Black Screen

Post by socratis »

Tune_Punch wrote:i think this is what you want andy
We need another log.

Right-click on the VM in the VirtualBox Manager and select "Show Log". Save only the first "VBox.log", ZIP it and attach it to your response.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
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Tune_Punch
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Re: Black Screen

Post by Tune_Punch »

here
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socratis
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Re: Black Screen

Post by socratis »

00:00:03.931845 NumCPUs  <integer> = 0x0000000000000001 (1)
I'd give your VM a 2nd CPU, you have 4 in your host, you can afford it.
00:00:03.931850 RamSize  <integer> = 0x0000000032000000 (838 860 800, 800 MB)
Same with the RAM, I'd give it 1536 MB (1.5 GB). Much more room to breathe. Again you can afford it.
00:00:03.932120 VRamSize <integer> = 0x0000000001000000 (16 777 216, 16 MB)
Take the VRAM to 128 MB under the Display settings.
00:00:03.932322 HM: HMR3Init: Falling back to raw-mode: VT-x is disabled in the BIOS for all CPU modes
00:00:04.735307 Full Name: "Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz"
You will need to address/fix the VT-x availability. Your i5-8300H most certainly supports VT-x, so it's a matter of enabling it in the BIOS. See your PC's manufacturer help on how to do this.

And finally, you will need to install the Guest Additions in your guest. See ch. 4.2.2. Guest Additions for Linux on how to do this.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
Tune_Punch
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Joined: 19. Sep 2018, 17:03

Re: Black Screen

Post by Tune_Punch »

thanks for the help. i think the problem was vt-x. i managed to boot ubuntu even without the guest adittions. shoul i still instal them
mpack
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Re: Black Screen

Post by mpack »

Tune_Punch wrote:shoul i still instal them
Yes. A VM with Guest Additions installed is a much more pleasant experience.
socratis
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Re: Black Screen

Post by socratis »

Tune_Punch wrote:i think the problem was vt-x
On the other hand, I think it was the 16 MB of VRAM. But in any event, I'm glad it worked out. Marking as [Solved].
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
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