✘ lyze@GaHoole ~ xrandr
Screen 0: minimum 8 x 8, current 3600 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected primary 1920x1080+1680+0 (normal left inverted right x axis y axis) 368mm x 207mm
1920x1080 60.0*+
1680x1050 60.0
1600x900 60.0
1400x1050 60.0
1280x1024 75.0 60.0
1280x960 60.0
1280x800 59.8
1280x720 60.0
1152x864 60.0
1024x768 75.0 70.1 60.0
800x600 75.0 72.2 60.3 56.2
640x480 75.0 72.8 59.9
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 59.9*+ 60.0
1280x1024 75.0 60.0
1280x960 60.0
1152x864 75.0
1024x768 75.0 70.1 60.0
800x600 75.0 72.2 60.3 56.2
640x480 75.0 72.8 59.9
DP-1 disconnected (normal left inverted right x axis y axis)
1280x800_60.00 (0x4f7) 83.5MHz
h: width 1280 start 1344 end 1480 total 1680 skew 0 clock 49.7KHz
v: height 800 start 801 end 804 total 828 clock 60.0Hz
1280x800_60.00_new (0x4fe) 83.5MHz
h: width 1280 start 1344 end 1480 total 1680 skew 0 clock 49.7KHz
v: height 800 start 801 end 804 total 828 clock 60.0Hz
1280x1024_60.00B (0x50b) 108.9MHz
h: width 1280 start 1360 end 1496 total 1712 skew 0 clock 63.6KHz
v: height 1024 start 1025 end 1028 total 1060 clock 60.0Hz
test (0x50d) 83.5MHz
h: width 1280 start 1344 end 1480 total 1680 skew 0 clock 49.7KHz
v: height 800 start 801 end 804 total 828 clock 60.0Hz
✘ lyze@GaHoole ~ gtf 1280 720 60.00
# 1280x720 @ 60.00 Hz (GTF) hsync: 44.76 kHz; pclk: 74.48 MHz
Modeline "1280x720_60.00" 74.48 1280 1336 1472 1664 720 721 724 746 -HSync +Vsync
lyze@GaHoole ~ xrandr --newmode "1280x720_60.00" 74.48 1280 1336 1472 1664 720 721 724 746 -HSync +Vsync
lyze@GaHoole ~ xrandr --addmode DVI-I-0 1280x720_60.00
lyze@GaHoole ~ xrandr --output DVI-I-0 --mode 1280x720_60.00 --right-of DVI-I-1
xrandr: cannot find mode 1280x720_60.00