id summary reporter owner description type status component version resolution keywords cc guest host 5771 OSX kernel panic in VBoxDrv.kext when starting virtual machines -> fixed in SVN/3.1.6 Peter Poeml "OSX 10.5.8, VirtualBox 3.1.0 (iMac Intel Core 2 Duo) Since today, I get host kernel crashes when starting a virtual machine. I haven't seen the problem so far, and have been using several different Linux VMs over weeks, with no problem. Today, I resumed an old CentOS VM that had been suspended since June. The VM has thus been created with a VirtualBox version older than 3.1.0. When the resume started, I shortly saw some kind of scroll bar, and then the crash happened (forcing me to reboot my iMac). I'll attach the kernel backtrace below. After rebooting, I tried this VM once more, and it resumed successfully (date was showing some day in June...), and seemed to work fine just fine. When I then started another VM (that I had been using several times during the last days/weeks), I got the same crash again. That one had been shutdown, not suspended. After another reboot, I tried it vice versa, and the crash happened when starting the second VM. Therefore, I have the suspicion that when I start more then one VM, starting the second results in the crash - at least when the one CentOS image is involved. I had been using several VMs simultaneously in the past, with no problem. [I'm not sure what the right component is for this, thus I chose other (the default)]" defect closed VMM/HWACCM VirtualBox 3.1.0 fixed Linux Mac OS X