22 hours ago
I am using Ubuntu 14.04 (Unity Desktop) on a Dell Inspiron 3531 laptop.
I tried connecting to an external monitor from my laptop's HDMI port. My laptop cannot connect. I ran xrandr. The xrandr says HDMI is disconnected. But strangely it says VGA is connected. This cannot be because my laptop has no VGA port. It only has HDMI.
I disconnected the HDMI cable from the HDMI port. Xrandr continue to indicate VGA is connected. So, I rebooted.
Even after rebooting, with no cable connection of any kind, then running xrandr, I continue to get a VGA is connected message.
What can I correct this?
4 hours ago
You have to add a new mode with a new resolution...
You can do it and apply the new resolution using the command:
xrandr --addmode <connection_type> 1200x1000_60.00
Where <connection_type> is usually VGA1, DP1 or HDMI1.
2 hours ago
I guess VGA1 is your laptop screen. To use the HDMI output you usually have to press a function key on the laptop keyboard. It should have an icon of a monitor on it. Connect the HDMI to a monitor then use the function key to toggle between VGA, HDMI and BOTH.