如何让 HDMI 端口输出到显示器?

如何让 HDMI 端口输出到显示器?

我有一个外置戴尔 P2412H 显示器连接到运行 Ubuntu 12.04 的笔记本电脑的 HDMI 端口。

xrandr报告:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
1366x768 60.0*+
1360x768 59.8 60.0 
1024x768 60.0 
800x600 60.3 56.2 
640x480 59.9 
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

看起来它无法识别所连接的显示器。

这是xrandr通过 VGA 连接时的报告:

Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
1366x768 60.0*+
1360x768 59.8 60.0 
1024x768 60.0 
800x600 60.3 56.2 
640x480 59.9 
VGA1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 299mm
1920x1080 60.0*+
1280x1024 75.0 60.0 
1152x864 75.0 
1024x768 75.1 60.0 
800x600 75.0 60.3 
640x480 75.0 60.0 
720x400 70.1 
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

请提供任何有用的想法。请记住,我对 Ubuntu 还很陌生,所以我更喜欢一些分步说明。

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