id summary reporter owner description type status component version resolution keywords cc guest host 6139 Virtualbox can't recognize amd-v Ahmed "I've used Virtualbox 3.0.12 and it's working fine , no problems at ll But recently I've updated to 3.1.2 version & all x64 guests failed to start claiming that AMD-V need to be enabled from bios I've double checked that Virtualization is enabled from bios I've attached /proc/cpuinfo" defect closed other VirtualBox 3.1.2 duplicate Linux Linux