我一直在 ubuntu 14.04 LTS 主机上运行 virtualbox（您从 apt-get 获得的最新版本）。通过 System Tools -> Administration -> Software Updater 进行了“正常”更新，将 virtualbox 更新为 4.3.34_Ubuntu r104062 。现在，当我尝试运行来宾操作系统（ubuntu 14.04）或使用 ubuntu 15.10 启动新来宾时，来宾在尝试启动时崩溃。
从 virtualbox 日志中，关键的几行似乎是：
00:00:31.838258 访客日志：BIOS：从 CD-ROM 启动... 00:00:32.028360 Display::handleDisplayResize(): uScreenId = 0, pvVRAM=00007f821b400000 w=640 h=480 bpp=16 cbLine=0x500, flags=0x1 00:00:32.028379 UIFrameBuffer::RequestResize: Screen=0, Format=843204434, BitsPerPixel=16, BytesPerLine=1280, Size=640x480, 发送到异步处理程序.. 00:00:32.028436 UIFrameBufferQImage::resizeEvent: Format=843204434, BitsPerPixel=16, BytesPerLine=1280, Size=640x480 00:00:32.028445 UIFrameBufferQImage::resizeEvent: 由于格式无效而调整到 FALLBACK 缓冲区的大小.. 00:00:45.670222 Display::handleDisplayResize(): uScreenId = 0, pvVRAM=0000000000000000 w=720 h=400 bpp=0 cbLine=0x0, flags=0x1 00:00:45.670249 UIFrameBuffer::RequestResize: Screen=0, Format=0, BitsPerPixel=0, BytesPerLine=0, Size=720x400, …