id summary reporter owner description type status component version resolution keywords cc guest host 8074 WinXP guest goes GURU while using serial port. hiwk "WinXP guest, openSuSE 11.2 host. Failure is not deterministic, but always when I use a program (MTK3) to program a MAXQ1850 over serial port. Short passage of the log: {{{ 00:07:18.403 00:07:18.403 !!Assertion Failed!! 00:07:18.403 Expression: RT_SUCCESS_NP(rc) 00:07:18.403 Location : /home/vbox/vbox-4.0.0/src/VBox/VMM/VMMGC/TRPMGCHandlers.cpp(225) int trpmGCExitTrap(VM*, VMCPU*, int, CPUMCTXCORE*) 00:07:18.438 PDMGetInterrupt failed with -304 00:07:19.440 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 00:07:19.440 !! 00:07:19.440 !! Guru Meditation 1103 (VINF_EM_DBG_HYPER_ASSERTION) 00:07:19.440 !! 00:07:19.440 !!Assertion Failed!! 00:07:19.440 Expression: RT_SUCCESS_NP(rc) 00:07:19.440 Location : /home/vbox/vbox-4.0.0/src/VBox/VMM/VMMGC/TRPMGCHandlers.cpp(225) int trpmGCExitTrap(VM*, VMCPU*, int, CPUMCTXCORE*) 00:07:19.440 PDMGetInterrupt failed with -304 }}} " defect closed uart VirtualBox 4.0.0 obsolete Windows Linux