我一直在努力尝试从我的 14.04 系统获得双外接显示器输出。一个显示器是 VGA，另一个是 HDMI。具体来说，我没有收到 HDMI 视频信号，但 Ubuntu 知道我连接了一台显示器。
我已经安装了 Nvidia 专有的 331 驱动程序，但仍然没有输出。我现在认为这与我的 Xrandr 配置有关
输出自xrandr
Screen 0: minimum 8 x 8, current 3520 x 1080, maximum 8192 x 8192
LVDS-0 disconnected primary (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1600x900+1920+0 (normal left inverted right x axis y axis) 382mm x 215mm
1600x900 60.1*+
1440x900 59.9
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1920x1080 60.0*
1024x768 60.0
800x600 60.3 56.2
848x480 60.0
640x480 59.9
1400x900_60.00 60.0
1920x1080_60.00 60.0
HDMI1 connected (normal left inverted right x axis y axis)
1920x1080 60.0 + 50.0 59.9
1920x1080i 60.1 50.0 60.0
1600x1200 60.0
1680x1050 59.9
1400x1050 59.9
1280x1024 75.0 60.0
1440x900 59.9
1280x960 60.0
1152x864 75.0
1280x720 60.0 50.0 59.9
1440x576 50.0
1440x576i 50.1
1024x768 75.1 70.1 60.0
1440x480 60.0 59.9
1440x480i 60.1 60.1
832x624 74.6
800x600 72.2 75.0 60.3 56.2
720x576 50.0
720x480 60.0 59.9
640x480 75.0 72.8 66.7 60.0 59.9
720x400 70.1
DP1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
1400x900_60.00 (0x2aa) 103.5MHz
h: width 1400 start 1480 end 1624 total 1848 skew 0 clock 56.0KHz
v: height 900 start 903 end 913 total 934 clock 60.0Hz
1920x1080_60.00 (0x2ab) 173.0MHz
h: width 1920 start 2048 end 2248 total 2576 skew 0 clock 67.2KHz
v: height 1080 start 1083 end 1088 total 1120 clock 60.0Hz
如您所见，HDMI 已连接，但显示器没有信号。
我有以下内容.xprofile
xrandr --newmode "1400x900_60.00" 103.50 1400 1480 1624 1848 900 903 913 934 -hsync +vsync
xrandr --addmode VGA1 1400x900_60.00
xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
xrandr --addmode VGA1 1920x1080_60.00
xrandr --output VGA1 --mode 1920x1080_60.00
xrandr --addmode HDMI1 1920x1080_60.00
xrandr --output HDMI1 --mode 1920x1080_60.00
我本以为这会正确设置 HDMI 显示器。当我运行此命令时
xrandr --output HDMI1 --mode 1920x1080_60.00
我明白了
xrandr: cannot find crtc for output HDMI1
命令 lspci 的输出：
lspci -k | grep -EA2 'VGA|3D'
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
Subsystem: Dell Device 044f
Kernel driver in use: i915
--
01:00.0 VGA compatible controller: NVIDIA Corporation GT216M [GeForce GT 330M] (rev a2)
Subsystem: Dell Device 044f
Kernel driver in use: nvidia
答案1
尝试您的电缆连接，它应该显示已连接，HDMI 有点棘手，并在显示器设置中打开 HDMI 并应用，当出现图像时说确定；
并将其设为默认设置。