id summary reporter owner description type status component version resolution keywords cc guest host 11008 PC-BSD guest: Segfault in libX11.so.6.3.0 when choosing ACPI shutdown Ken Sharp "kernel: [67331.018664] VirtualBox[9804]: segfault at ffffffffc00c6b28 ip 00007f88119fec58 sp 00007fffabbfbe40 error 4 in libX11.so.6.3.0[7f88119cb000+12f000] When choosing ACPI shutdown (or Host+H) Vbox simply segfaults and exits. This happens every time. Not sure how to debug this but will, of course, do any debugging that is necessary. Running Ubuntu Precise amd64 with Unity 2D, updated." defect closed other VirtualBox 4.2.0 fixed BSD Linux