求助～F8显示问题

将system-config-display里面改成1024*768后就在也打不开system-config-display这个工具了～用终端命令后显示如下：
[root@localhost nikey]# system-config-display
Traceback (most recent call last):
File "/usr/share/system-config-display/xconf.py", line 381, in
dialog = xConfigDialog.XConfigDialog(hardware_state, xconfig, rhpxl.videocard.VideoCardInfo())
File "/usr/share/system-config-display/xConfigDialog.py", line 533, in __init__
self.state.recalc_mode()
File "/usr/lib/python2.5/site-packages/rhpxl/xhwstate.py", line 387, in recalc_mode
self.colordepth = availableDepth[-1]
IndexError: list index out of range
是什么原因呢？
等您的回答谢谢～！