I am running Intel HD Iris Plus Graphics on 1.4HDMI port, which is all cool. However my monitor does not want to display 60hz at monitor's native resolution, its stuck at 30hz.
Some commands I followed:
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cvt 2560 1440
# 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
Modeline "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
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xrandr --newmode "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
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DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
1920x1080 60.00 + 50.00 59.94
2560x1440 29.95*
1920x1200 59.95
1600x1200 60.00
1280x1440 59.90
1440x1280 59.91
1400x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1360x768 59.95
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
2560x1440_60.00 (0x173) 312.250MHz -HSync +VSync
h: width 2560 start 2752 end 3024 total 3488 skew 0 clock 89.52KHz
v: height 1440 start 1443 end 1448 total 1493 clock 59.96Hz
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xrandr --addmode HDMI1 2560x1440_60.00
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Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
1920x1080 60.00 + 50.00 59.94
2560x1440 29.95*
1920x1200 59.95
1600x1200 60.00
1280x1440 59.90
1440x1280 59.91
1400x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1360x768 59.95
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
2560x1440_60.00 59.96
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
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xrandr --output HDMI1 --mode 2560x1440_60.00
xrandr: Configure crtc 0 failed