[问题]Virtualbox1.4 无法启动

[xmlone]

我是在Ubuntu7.04里安装Virtualbox1.4,并安装了XP系统，前几次用还挺好的，今天突然就启不来了，在终端里输入VirtualBox后出现如下错误信息，请教各位老大这是什么问题，有没有办法解决？
Qt WARNING: X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Qt WARNING: Failed to open device
Qt WARNING: X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Qt WARNING: Failed to open device
段错误 (core dumped)