AMD-V is disabled in the BIOS (VERR_SVM_DISABLED)

[carbonfoil]

I just found a work-around for an error which stopped my VirtualBox clients from booting after I had ugraded the host OS to Ubuntu 14.04):

PROBLEM: After upgrading to Ubuntu 14.04 LTS my Windows XP clients in VirtualBox could not boot anymore and showed the following error: AMD-V is disabled in the BIOS (oy by the host OS) (VERR_SVM_DISABLED)

Host: AMD Phenom(tm) 9850 Quad-Core Processor × 4
Host OS: Ubuntu 14.04 LTS, 64-bit
Client OS: Windows XP, 32-bit
VitrualBox: 4.3.10_Ubuntu r93012

SOLUTION/WORK AROUND: Any change the guest OS settings seems to do the trick: General > Basic > Version: from "Windows XP (32-bit)" to "Windows 2003 (32-bit)" or "Windows 7 (32-bit)"

Hope that helps some of you, too!

[mpack]

I'm afraid that is not a fix. The fact that it worked for you is probably accidental.

VT-x/AMD-v is required to run any 64bit guest, or any guest which uses multiple cores, likewise if you explicitly enable the VT-x/AMD-v option yourself in the VM settings (this is likely to be what you undid by selecting a different settings template).

If you get that error message then pay attention to what it's telling you: your PC does support AMD-v, but your host's BIOS is currently disabling it. So, the true fix is to boot into your hosts BIOS config feature and enable AMD-v support.

If the error was instead VERR_VMX_NO_VMX (or similar, that's from memory) then that's different. It means that your host PC doesn't support VT-x/AMD-v at all, hence you can't use any of the guest features mentioned in my second paragraph.

[Nickname666]

If its only a setting in the BIOS, as you so expertly assert, then how could this problem appear over a reboot?
A Virtual Box setup that has been working for months. I saw notices that Manjaro Linux required an update.
I did the update, then reboot the computer.
After the reboot, the previously working virtual box now gives this error message.
I was litterally running the VB right up to the time of the update. After update and reboot, I now get this error msg.
Nothing changed in the BIOS during the reboot. Never even hit the DEL button to enter BIOS (or really UEFI settings).
So, why am I getting this error if its only cause is from the BIOS?

And, yes, the msg is (this is copy and paste)
AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED).

[scottgus1]

@Nick, did you happen to notice that the previous posts date from 2014? And OP only did this one post?

Let the dead sleep.

Or you could start a new thread, as would be indicated by Do not hijack other threads, create your own. Choose your title carefully. When (if) you do start a new thread, see Minimum Info Needed for Assistance.

[socratis]

Let the dead sleep.

There have been a lot of changes since 2014. Drastic/dramatic ones. This thread is no longer current, locking it.