无法连接Ubuntu 18.04上的HDMI

Question

在运行Ubuntu18.04时，我无法将我的笔记本与外部监视器连接起来。它在Windows中运行得很好。

下面是命令xrandr的输出

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
   3840x2160     60.02 +  60.00    60.01    59.98    48.01    59.97  
   3200x1800     59.96    59.94  
   2880x1620     59.96    59.97  
   2560x1600     59.99    59.97  
   2560x1440     59.99    59.99    59.96    59.95  
   2048x1536     60.00  
   1920x1440     60.00  
   1856x1392     60.01  
   1792x1344     60.01  
   2048x1152     59.99    59.98    59.90    59.91  
   1920x1200     59.88    59.95  
   1920x1080     60.01    59.97    59.96    59.93* 
   1600x1200     60.00  
   1680x1050     59.95    59.88  
   1600x1024     60.17  
   1400x1050     59.98  
   1600x900      59.99    59.94    59.95    59.82  
   1280x1024     60.02  
   1440x900      59.89  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1440x810      60.00    59.97  
   1368x768      59.88    59.85  
   1360x768      59.80    59.96  
   1280x800      59.99    59.97    59.81    59.91  
   1152x864      60.00  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   800x512       60.17  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   720x450       59.89  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   680x384       59.80    59.96  
   640x400       59.88    59.98  
   576x432       60.06  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
   1920x1080     60.01  
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)

它显示HDMI-1断开即使是当它是插入.我还尝试运行以下命令

xrandr --addmode HDMI-1 1920x1080
xrandr --output HDMI-1 --mode 1920x1080 --right-of eDP-1

但是它输出(在运行第二个命令之后)

找不到1920x1080模式

请就这个问题提出建议。

Answer 1

我找到了解决这个问题的办法。我安装了Ubuntu18.04，这样我的笔记本电脑就不会醒来，也不会在挂起之后出现一个空白的屏幕。其他用户也报告了类似的问题这里。为了解决挂起问题，我在/etc/default/grub文件中设置了GRUB_CMDLINE_LINUX="nouveau.modeset=0"。

但是，设置这个内核参数会导致检测外部HDMI屏幕的问题。在移除它并设置GRUB_CMDLINE_LINUX=""之后，Ubuntu似乎对外部HDMI进行了检测并进行了良好的工作。