[Nouveau] Problem with external monitor on laptop

[don fisher]

On 06/22/2018 07:55 PM, don fisher wrote:
> I am running opensuse Leap 15 on an Alienware laptop. When I plug a 
> monitor into the HDMI socket xrandr shows that is disconnected. How can 
> I get the system to send an event or something so it will look and see 
> that a monitor is there. If I cycle power on the computer with the 
> monitor connected both monitors come up connected. The command xrandr 
> --auto does not bring the disconnected monitor to life. The output of 
> xrandr on the system with both monitors is:
> 
>   Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
> LVDS-1 connected 1920x1080+0+0 (normal left inverted right x axis y 
> axis) 409mm x 230mm
>     1920x1080     60.00*+
>     1680x1050     59.95
>     1400x1050     59.98
>     1280x1024     59.89
>     1280x960      59.94
>     1152x864      59.96
>     1024x768      59.92
>     800x600       59.86
>     640x480       59.38
>     720x400       59.55
>     640x400       59.95
>     640x350       59.77
> DP-1 disconnected (normal left inverted right x axis y axis)
> HDMI-1 disconnected (normal left inverted right x axis y axis)
> HDMI-2 connected 1920x1080+0+0 (normal left inverted right x axis y 
> axis) 698mm x 392mm
>     1920x1080     60.00*+  50.00    59.94
>     1680x1050     59.88
>     1600x900      60.00
>     1280x1024     75.02    60.02
>     1440x900      59.90
>     1280x800      59.91
>     1152x864      75.00
>     1280x720      60.00    50.00    59.94
>     1024x768      75.03    70.07    60.00
>     832x624       74.55
>     800x600       72.19    75.00    60.32    56.25
>     720x576       50.00
>     720x480       60.00    59.94
>     640x480       75.00    72.81    66.67    60.00    59.94
>     720x400       70.08
> 
> Any input or guidance will be appreciated.
> 
> Don
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Sorry, problem with setup. I tried to use an HDMI switch to connect my 
monitor between two computers on my desk while debugging. I forgot about 
the peripheral emulation feature provided by KVMs, not provided bu a 
switch. So I have ordered a 2 port KVM to replace the switch.

Don