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#1 2021-10-25 19:43:28

Chad Rosswick
Member
Registered: 2021-06-27
Posts: 36

[SOLVED] Qemu KVM results in black screen regardless of configuration

A few weeks ago I tried getting a Qemu KVM with single-GPU passthrough working but failed. So I gave up. The thing is though: Back then a basic VM without any passthrough magic or anything was working. Now nothing is working.
I'm using virt-manager. When I create a standard VM without any passthrough magic and start the installation process I instantly get booted to a black screen. The computer is still running but I can't do anything with it (I haven't tried pinging or sshing yet so maybe linux is still running).

Now I'm at a loss. I don't know what to do anymore. I'm going to give you as much system information upfront as I can.
uname -a:

Linux Arch-PC 5.14.14-arch1-1 #1 SMP PREEMPT Wed, 20 Oct 2021 21:35:18 +0000 x86_64 GNU/Linux

libvirt log from my last attempt to start a vm: https://pastebin.com/c50yDTG4

Last edited by Chad Rosswick (2021-10-25 20:53:44)

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#2 2021-10-25 19:57:12

jasonwryan
Anarchist
From: .nz
Registered: 2009-05-09
Posts: 30,426
Website

Re: [SOLVED] Qemu KVM results in black screen regardless of configuration

Please remove the completely unnecessary and oversized meme: http://wiki.archlinux.org/index.php/Cod … s_and_code


Arch + dwm   •   Mercurial repos  •   Surfraw

Registered Linux User #482438

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#3 2021-10-25 20:03:27

Chad Rosswick
Member
Registered: 2021-06-27
Posts: 36

Re: [SOLVED] Qemu KVM results in black screen regardless of configuration

jasonwryan wrote:

Please remove the completely unnecessary and oversized meme

Alright sorry

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#4 2021-10-25 20:16:44

Chad Rosswick
Member
Registered: 2021-06-27
Posts: 36

Re: [SOLVED] Qemu KVM results in black screen regardless of configuration

Okay so the problem seems to be in libvirt. I tried running a vm just using qemu and that worked.

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#5 2021-10-25 20:54:38

Chad Rosswick
Member
Registered: 2021-06-27
Posts: 36

Re: [SOLVED] Qemu KVM results in black screen regardless of configuration

I was just being stupid. The scripts that I downloaded in the process of setting up the single gpu passthrough did unbind the graphics driver whenever a VM ist started.

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