VirtualBox on Ubuntu has an issue preventing host waking up from suspend. This issue is marked as resolved, but unfortunately it’s still present in 3.1.2 r56127 running under control of Ubuntu x64. The workaround for this issue is well documented: disable VT-x/AMD-v support. Fine, but… the option is greyed out in the settings: To change… Continue reading Disabling VT-x/AMD-v in VirtualBox on Ubuntu