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Freezing VB

Posted: 1. Aug 2019, 19:20
by momceras
Hi,
Sory for my english, but I will try to explain my problem.

VB started to hang after start any guest (even new ones).
My guest's are windows, ubuntu and debian, so it should be a host side problem.

Since the hosts are hanging, I canĀ“t give a real clean log from the machine. I have to kill VB to get access again.
There is one sample with a windows 7 guest machine.

Steps to try to fix:
-Unintalled and reinstalled VB
-Installed an upgraded VB after Uninstalled
-Create a new VB guest


Any hint would be preciated

Re: Freezing VB

Posted: 1. Aug 2019, 19:39
by scottgus1
The last line of the posted log is:
00:00:10.621612 VMMDev: Guest Log: BIOS: Booting from Hard Disk...
Do all of the guest logs end like this?

This is also in the log:
00:00:05.714728 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:05.979968 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...
This is a sign that you may see the green turtle icon Image in the guest task bar, instead of the normal blue square V Image, indicating that your guest is booting but is going to be mind-numbingly slow doing it.

This slowness is due to Hyper-V hogging the VT-x capabilities of the host. See I have a 64bit host, but can't install 64bit guests Carefully go through each command in the 2nd & 3rd posts.

Re: Freezing VB

Posted: 7. Aug 2019, 11:59
by momceras
I'm attaching another VM. This time is a live cd based on a 32 bits setup. Same problem occurs.

Re: Freezing VB

Posted: 7. Aug 2019, 12:45
by momceras
It seems is't fixed by removing VirtualMachinePlatform
I have used
Disable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform
using powershell

Re: Freezing VB

Posted: 7. Aug 2019, 13:36
by scottgus1
Still the same problem:
00:00:26.438170 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:26.465790 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...
What made you settle on just that one powershell command? Interestingly it is not mentioned in the tutorial linked above, which has always fixed this problem for those who actually follow the tutorial....

Re: Freezing VB

Posted: 14. Aug 2019, 08:32
by socratis
scottgus1 wrote:Still the same problem:
The log was captured before the problem was solved apparently ;)
scottgus1 wrote:What made you settle on just that one powershell command? Interestingly it is not mentioned in the tutorial linked above
"Virtual Machine Platform" is one of the things to check for. Now... how do you remove it? There are many ways to skin a cat, a specific PowerShell command can be one of them.

Re: Freezing VB

Posted: 14. Aug 2019, 13:45
by scottgus1
socratis wrote:many ways to skin a cat
How true! (You should have seen the look I got from a guy when I said that to him once. Like I was about to start an animal sacrifice or something... :shock: )

I had gotten the impression that OP hadn't actually read the 64-bit tutorial, but yes I see now the "Virtual Machine Platform" in the list of things to check off.