virtualbox.org

Hello Everyone

So I've been facing this problem for the last 3 days and I tried all the possible solutions online, none of them worked. The problem is when I enter my password for the login, the screen repositionning starts fixing the resolution, then the screen goes black for no reason. I can still see the linux mouse moving, but I can't click on something, or activate the terminal prompt with alt+T or Ctrl+alt+F2. I really wish if someone can help me regarding this problem because I have a bunch of projects on this machine and I don't want to lose them and reinstall another one, fall into the same problem again. I can dump the logs if you think they're helpful. The solutions I tried include:
* Terminal prompt -> update+upgrade -> mount vbox additions disk and install -> reboot
* Turn hyper-v off
* Install new gdm3 version

My machine specs:
RAM: 5012mb
CPU: 2 cores
2 network adapters
Storage: 80gb

Thank you in advance

Please provide a VM log file. Make sure the VM is fully shut down, then right click it in the manager UI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Attach the zip here.

Thank you for the reply, you will find attached the zip file of the logs.

For future reference "zipping the file" does not mean "renaming it to have a zip extension". It means to compress the file with a zip compression tool. In Windows hosts it's especially easy: you just right click the file | Send to | zip folder.

Give your VM 2 cores. Give it 128MB graphics RAM. The template for Kali should have been Debian, not Ubuntu.

But your main problem will be because Hyper-v is enabled.

00:00:06.373463 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:06.493186 NEM: info: Found optional import WinHvPlatform.dll!WHvQueryGpaRangeDirtyBitmap.
00:00:06.493275 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

See HMR3Init: Attempting fall back to NEM (Hyper-V is active).

Thank you for the clarifications,

I was mistaken to attach the wrong file, you will find attached the correct one, and regarding the hyper-v I tried to disable it and start the machine, but that didn't help. I hope you will find a solution for this problem.

Thank you once again.

The warning message is still there in the Log:

00:00:06.356474 ********************* End of CFGM dump **********************
00:00:06.356637 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:06.463983 NEM: info: Found optional import WinHvPlatform.dll!WHvQueryGpaRangeDirtyBitmap.
00:00:06.464103 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

So either Hyper-v is still active or one or more of the Windows "Guard" features mentioned in the Tutorial is still enabled.

I attached a link to my previous post. Please follow the link and read the contents - it tells you how to disable Hyper-v correctly.

The solution was funny, it was a weird resolution error because of the VBox addons, so when the user logs in, the screen resolution is fixed according to the host screen. And when I logged in, the screen resolution utility bugs out and I see nothing but black. I tried to click on the resize window button (next to the close button) and it worked. Thank you very much for the answers!

splint3rsec wrote:when the user logs in, the screen resolution is fixed according to the host screen.

This is probably the VM set to run Full-Screen. That causes the VM to be the same resolution as the host monitor, and the host desktop is completely hidden.

splint3rsec wrote:And when I logged in,

While the other user is logged in? How is that possible? Are you remoting in?