id summary reporter owner description type status component version resolution keywords cc guest host 571 VirtualBox crashes often chriz "Host: Fedora 7 Guest: Windows 2000 Virtualbox crashes very often without an error message, even VBox.log doesn't seem to contain current messages (I attached it anyway). I haven't found a pattern for the crashes yet. Sometimes it happens while working in the guest, sometimes it simply vanishes while idle. Following the description in ticket #487 I was able to create a backtrace: {{{ Core was generated by `/opt/VirtualBox-1.4.0/VirtualBox -comment vwin1 -startvm 9c7cf167-1de8-4ea5-729'. Program terminated with signal 6, Aborted. #0 0x00110402 in __kernel_vsyscall () (gdb) bt #0 0x00110402 in __kernel_vsyscall () #1 0x0632cfa0 in raise () from /lib/libc.so.6 #2 0x0632e8b1 in abort () from /lib/libc.so.6 #3 0x06363d6b in __libc_message () from /lib/libc.so.6 #4 0x0636cbdc in _int_malloc () from /lib/libc.so.6 #5 0x0636debe in malloc () from /lib/libc.so.6 #6 0x034f6c05 in QGArray::QGArray$base () from /usr/lib/qt-3.3/lib/libqt-mt.so.3 #7 0x0315418b in QRegion::QRegion () from /usr/lib/qt-3.3/lib/libqt-mt.so.3 #8 0x0315bae9 in QWidget::update () from /usr/lib/qt-3.3/lib/libqt-mt.so.3 #9 0x08180726 in QTextEdit::setWrapPolicy () #10 0xb6866268 in ?? () #11 0x00000293 in ?? () #12 0x00000281 in ?? () #13 0x0000000d in ?? () #14 0x0000000d in ?? () #15 0x00459830 in pthread_mutex_unlock () from /lib/libpthread.so.0 #16 0x077d88ad in ?? () from /opt/VirtualBox-1.4.0/components/VBoxC.so #17 0x077d8b10 in ?? () from /opt/VirtualBox-1.4.0/components/VBoxC.so #18 0x01f67947 in ?? () from /usr/lib/VBoxDD.so #19 0x001b638e in IOMIOPortWrite () from /usr/lib/VBoxVMM.so #20 0x001b646c in IOMInterpretOUT () from /usr/lib/VBoxVMM.so #21 0x001e03c0 in ?? () from /usr/lib/VBoxVMM.so #22 0x001e08ed in ?? () from /usr/lib/VBoxVMM.so #23 0x001e1a7a in EMR3ExecuteVM () from /usr/lib/VBoxVMM.so #24 0x001bd40d in ?? () from /usr/lib/VBoxVMM.so #25 0x0013da91 in ?? () from /usr/lib/VBoxRT.so #26 0x0014687a in ?? () from /usr/lib/VBoxRT.so #27 0x0045644b in start_thread () from /lib/libpthread.so.0 #28 0x063d480e in clone () from /lib/libc.so.6 (gdb) }}} Hopefully that helps finding the culprit. If you need more infos, please let me know. " defect closed other VirtualBox 1.4.0 worksforme other other