求助～X Error of failed request: BadAlloc

legendyao

运行ucsf chimera(分子模型显示软件）时候总会出现:
X Error of failed request:  BadAlloc (insufficient resources for operation)
  Major opcode of failed request:  145 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Serial number of failed request:  706
  Current serial number in output stream:  707
按照一些人的办法在xorg.conf的section device里加入option "AccelMethod" "XAA"，重启X后运行软件直接跳出X界面。。
能有大大告诉我如何解决吗？谢谢～
系统是fedora6,vmware虚拟机下的