This message was posted on behalf of Intel Corporation
We would need to narrow down the issue. I verified the maximum resolution supported by the HD Iris 5100 and the resolution that you want is supported with a maximum of 24Hz.
Please plug your TV directly to the pc and try to get 1920x1200@24Hz
DisplayPort* 1.2 / eDP*
H-Processors: 3840 x 2160 @ 60 Hz (Ultra-HD)
U-Processors: 3200 x 2000 @ 60 Hz, 3840 x 2160 @ 30 Hz
Y-Processors: 2560 x 1600 @ 60 Hz
HDMI*: 4096 x 2304, 3840 x 2160 @ 24 Hz / 24bpp
DVI: 1920 x 1200 @ 60 Hz
If problem continues, let me know your system configuration. Send to me the results of Intel® System Support Utility.
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