Recently I ran into an issue when working on creating a test cluster environment for Windows 2008 R2 with Oracle VirtualBox running on Fedora 16 64 bit on a Dell Optiplex 755.
The issue was VirtualBox would complain about VT-x/AMD-V not being enabled and would stop the VM from loading. After doing some digging around found that there is a specific setting in the BIOS to enable what is needed to enable the settings for 64 bit VM’s to run. These changes will also work in enabling Hyper-V to run properly on Windows systems.
To fix this, boot the computer and press F2 to enter the BIOS.
In the BIOS you need to change the following settings
Security > Execute Disable (set to On)
Performance > Virtualization (set to On)
Performance > VT for Direct I/O Access (set to On)
Performance > Trusted Execution (set to Off)
Save and exit the BIOS, then power the computer down. it is important that the system be powered down.
After the system was powered up, the VM started properly with 64 bit support.
15 Responses to “Enable Virtualization on Dell Optiplex 755 to run Oracle VirtualBox 4”
- Ubuntu:No option for 64-bit OS VirtualBox guest OS in Ubuntu 14.10 Dell OptiPlex 755 – Ubuntu Linux Questions - […] Thanks to the article that pinpoited exact issue with bios on dell optiplex755 http://lifeofageekadmin.com/enable-virtualization-on-dell-optiplex-755-to-run-oracle-virtualbox-4/ […]