我按照论坛的方法安装联想y480的显卡驱动，出现如下问题，请高手帮忙看一下

[kevin-liu]

用的是bumblebee,到最后开启测试画面时出现
kevin@kevin-Lenovo-IdeaPad-Y480:~$ sudo optirun glxgears
[ 648.213742] [ERROR]Cannot access secondary GPU - error: You need to change the ConnectedMonitor setting in /etc/bumblebee/xorg.conf.nvidia to CRT-0

[ 648.213832] [ERROR]Aborting because fallback start is disabled.

怎么回事
~$ lspci |grep VGA
引用:
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fd1 (rev ff)
~$ optirun glxgears
引用:
[
39.639650] [ERROR]Cannot access secondary GPU - error: You need to
change the ConnectedMonitor setting in /etc/bumblebee/xorg.conf.nvidia
to CRT-0

[ 39.639688] [ERROR]Aborting because fallback start is disabled.
~$ lspci |grep VGA
引用:
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fd1 (rev a1)

开机什么都没做打开终端按上面的顺序操作。求教 这回该向那个方向操作。
1、开始的时候N卡是关的。
2、想看下独显效果。有错误没成功
3、N开就开了。不知道改怎么办了。

[kevin-liu]

改成CRT-0后 optirun glxgears变成这样了
[ 3704.637633] [ERROR]Cannot access secondary GPU - error: X did not start properly

[ 3704.637688] [ERROR]Aborting because fallback start is disabled.
不知到怎么回事