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Try to type "VGA-1" instead of "VGA1".

Edited

I had the same problem with ubuntu 16.04 LTS. Changing "VGA1" to "VGA-1" fixed the problem.

Actually you can see what is the name of the output you trying to find (and manage) by typing in the terminal: xrandr --listmonitors. In my case it's name was "VGA-1".

P.S.

My laptop is lenovo too.

Try to type "VGA-1" instead of "VGA1".

I had the same problem with Ubuntu 16.04 LTS. Changing "VGA1" to "VGA-1" fixed the problem.

Actually you can see what is the name of the output you trying to find (and manage) by typing in the terminal: xrandr --listmonitors. In my case (also a Lenovo) its name was "VGA-1".

Try to type "VGA-1" instead of "VGA1". I had the same problem with ubuntu 16.04 LTS. Changing "VGA1" to "VGA-1" fixed the problem.

Actually you can see what is the name of the output you trying to find (and manage) by typing in the terminal: xrandr --listmonitors. In my case it's name was "VGA-1".

Try to type "VGA-1" instead of "VGA1".

Edited

I had the same problem with ubuntu 16.04 LTS. Changing "VGA1" to "VGA-1" fixed the problem.

Actually you can see what is the name of the output you trying to find (and manage) by typing in the terminal: xrandr --listmonitors. In my case it's name was "VGA-1".

P.S.

My laptop is lenovo too.

Try to type "VGA-1" instead of "VGA1"

Try to type "VGA-1" instead of "VGA1". I had the same problem with ubuntu 16.04 LTS. Changing "VGA1" to "VGA-1" fixed the problem.

Actually you can see what is the name of the output you trying to find (and manage) by typing in the terminal: xrandr --listmonitors. In my case it's name was "VGA-1".