我的显示器有问题，一个显示器连接到内置 VGA 端口，另一个显示器连接到我的显卡（NVIDIA GeForce210）。起初这两个显示器工作正常，但当我安装 NVIDIA GeForce210 的驱动程序时，连接到内置 VGA 端口的显示器停止工作（不再被检测到）。
当我运行时xrandr，结果如下：
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 8192 x 8192
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 413mm x 234mm
1366x768 59.8*+
1360x768 60.0
1024x768 75.0 72.0 70.1 60.0
800x600 75.0 72.2 60.3 56.2
640x480 75.0 72.8 59.9
640x400 70.1
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
和sudo lshw -c video：
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 8192 x 8192
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 413mm x 234mm
1366x768 59.8*+
1360x768 60.0
1024x768 75.0 72.0 70.1 60.0
800x600 75.0 72.2 60.3 56.2
640x480 75.0 72.8 59.9
640x400 70.1
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
And `sudo lshw -c video`:
*-display
description: VGA compatible controller
product: GT218 [GeForce 210]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a2
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:45 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
*-display
description: Display controller
product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:43 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)