xrandr "cannot find mode 1800x950"cvt 1800 9501800x950 59.89 Hz (CVT) hsync: 59.05 kHz; pclk: 141.25 MHz
Modeline "1800x950_60.00" 141.25 1800 1912 2096 2392 950 953 963 986 -hsync +vsyncxrandr --newmode "1800x950_60.00" 141.25 1800 1912 2096 2392 950 953 963 986 -hsync +vsync
xrandr --addmode VIRTUAL1 1800x950_60.00