Comment 29 for bug 1313539

This bug is still present in Xubuntu 16.04.1. It is not specific to nVidia or DisplayPort hardware.

If I power off the Sony TV to which the Xubuntu machine is connected via HDMI, when the TV is powered on there is no signal to the TV.

Restarting lightdm will return video output, but not audio.

I am using embedded Intel graphics. Output of lspci and xrandr are below:

00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm
   1920x1080 60.00*+ 59.94 24.00 23.98
   1920x1080i 60.00 59.94
   1280x1024 60.02
   1280x720 60.00 59.94
   1024x768 60.00
   1440x480i 59.94
   800x600 60.32
   720x480 60.00 59.94
   720x480i 60.00 59.94
   640x480 60.00 59.94
HDMI2 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)