驱动管理器 里面安装的？

[    49.897] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[    49.898] (II) NVIDIA(GPU-0): Display (Lenovo Group Limited (DFP-0)) does not support NVIDIA
[    49.898] (II) NVIDIA(GPU-0):     3D Vision stereo.
[    49.911] (II) NVIDIA(0): Setting mode "LVDS-0: nvidia-auto-select @1366x768 +0+0 {ViewPortIn=1366x768, ViewPortOut=1366x768+0+0}, VGA-0: nvidia-auto-select @1024x768 +0+0 {ViewPortIn=1024x768, ViewPortOut=1024x768+0+0}"
[    49.941] (II) NVIDIA(0): Setting mode "LVDS-0: nvidia-auto-select @1366x768 +1024+0 {ViewPortIn=1366x768, ViewPortOut=1366x768+0+0}, VGA-0: nvidia-auto-select @1024x768 +0+0 {ViewPortIn=1024x768, ViewPortOut=1024x768+0+0}"
[    65.630] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[    65.630] (II) NVIDIA(GPU-0): Display (Lenovo Group Limited (DFP-0)) does not support NVIDIA
[    65.630] (II) NVIDIA(GPU-0):     3D Vision stereo.
[    68.013] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[    68.013] (II) NVIDIA(GPU-0): Display (Lenovo Group Limited (DFP-0)) does not support NVIDIA
[    68.013] (II) NVIDIA(GPU-0):     3D Vision stereo.
[    79.162] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[    79.162] (II) NVIDIA(GPU-0): Display (Lenovo Group Limited (DFP-0)) does not support NVIDIA
[    79.162] (II) NVIDIA(GPU-0):     3D Vision stereo.
@yanbowen,为啥会有扩展的偏移？
另外你再调出终端(ctrl+alt+T)，xrandr看一下你的输出结果

输入xrandr 后如何修改才让dock恢复正常