VirtualBox

Opened 7 years ago

Closed 7 years ago

#16863 closed defect (worksforme)

Erratic 64-bit/acceleration recognition

Reported by: NotLiable Owned by:
Component: VM control Version: VirtualBox 5.1.22
Keywords: VT-x/AMD-V, 64-bit Cc:
Guest type: Linux Host type: Windows

Description

On a Windows 7 box which until a few days ago successfully ran Virtual Box v5.1.22, I am now experiencing erratic behavior when I either try to create a new 64-bit VM or start an existing one. The Speccy program reports that virtualization is "supported, enabled" (verified in BIOS) but VB insists, but not all the time!, that such is not true. When I try in these cases to start a VM, I see "VT-x/AMD-V hardware acceleration is not available on your system. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot." If I proceed, the kernel reports "This kernel requires an x86-64 CPU, but only detected an i686 CPU. This processor is unsupported in CentOS 7." and stops. The Acceleration tab in the VM Settings menu is grayed out. When I try in these cases to create a new VM, only 32-bit Linux options are offered. I have completely removed and reinstalled VB software and extension packs and tried the Repair option via the Windows Control Panel. I even re-FLASHed the BIOS chip and re-seated it. A suggestion found online was that a Windows program could be blocking acceleration, but this is too inconsistent. Really at a loss here! Arthur

Attachments (1)

CentOS-2017-06-28-14-10-24.log (95.8 KB ) - added by NotLiable 7 years ago.
Log file as requested

Download all attachments as: .zip

Change History (4)

by NotLiable, 7 years ago

Log file as requested

comment:1 by Socratis, 7 years ago

Arthur, may I suggest something? It's usually better and faster, if issues like this one (configuration, question) get first addressed in the VirtualBox forums. More than 95% of the issues are resolved over there, which keeps the developers focusing on the bug fixes and enhancements, and there is no need for another ticket to keep track of. For example, yours is not a bug and someone from the developers has to deal with it and close it as "Invalid".

Please go thoroughly through the FAQ: I have a 64bit host, but can't install 64bit guests. It hasn't failed yet...

comment:2 by Frank Mehnert, 7 years ago

The VBox.log file you attached shows that AMD-V is available and used.

comment:3 by Frank Mehnert, 7 years ago

Resolution: worksforme
Status: newclosed
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