My notebook is connected to a HDTV through a KVM Switch (one other notebook also connected to the same HDTV). The problem seems to be that Ubuntu doesn't recognize the HDTV to be turned on and therefore doesn't enable the VGA output. As far as I understand it has something to do with EDID information not being send trough the KVM Switch.
xrandr won't enable the VGA output through xrandr --output VGA1 --auto
, it just keeps showing as disconnected.
Can I somehow force the VGA port to send a signal?
My Graphics Controller:
Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03)
Best Answer
Yes,you can , but
--auto
is doing the right thing. Instead do something like:For other users with a similar problem on all video outputs, first run
xrandr
to see what outputs you have.In this case the main screen is called eDP1 and the additional outputs are VGA1, HDMI1 and DP1 (Mini DisplayPort)
As an example, to force output to the Mini DisplayPort at 720x480 run
and then