Problem: cannot increase screen resolution on Raspbian Pixel for PC on DELL Optiplex 755 and ASUS monitor.
The monitor is an ASUS VW202S with a single VGA port It works fine at screen resolution of 1680x1050 from a Pi 3 running Raspbian Stretch with a HDMI/VGA adapter.
However, I have a DEL Optiplex 755 with Pixel for PC installed. The DELL only has a DVI video port, so I am using a DVI to VGA cable to the same ASUS monitor as above. The maximum resolution I get is 1024x768, but I want 1680x1050 (like when using the Pi)
The PC version of Raspbian does not have the Resolution menu option under Preferences / Raspberry Pi Configuration / System
Also there is no config.txt file in the /boot folder.
So I cannot use the suggestions made by many on the forums
I did find some suggestions on a Ubuntu forum, suggesting using xrandr, as follows:
xrandr --newmode "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
xrandr --addmode VGA1 1680x1050_60.00
But how do I now use that new resolution? On Ubuntu, simply go to Settings - but where to go on Raspbian Pixel for PC ?