Hi Ra, We'll need a bit more detail to be able to help here. The fact something works in Bochs but doesn't work in qemu doesn't necessarily mean it's a qemu bug - for example the OS might be hitting something undefined or a timing issue; so we'd need some information on how the double page fault happened. Does it work with KVM enabled? With tcg? What version of qemu are you using?
** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1785308 Title: 0x8 exception encountered but not handled Status in QEMU: Incomplete Bug description: Present in all QEMU versions. OS is triple page faulting and crashing rather than handling the expected double page fault properly. The same OS works in Bochs so I know its not the problem. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1785308/+subscriptions