1080p output on a UHD screen with Intel Graphics (June 2016)

[TBerl]

I have a new problem; after connecting UHD TV on my Intel Graphics 5100 Iris box; it seems like the output will always be 3840x2160 regardless what resolution I select. Sometimes I mange to get 1080p, but after changing refresh rate or resolution again it always ends up with selected resolution (for example 1920x1080) upscaled to display resolution (3840x2160).

I often also get black screen when selecting a resolution. Problem for me is that computer runs HDMI 1.4a; which of course is limited to 30Hz in UHD. While HD-resolution should be supported up to 60Hz. My solution for this has been to connect a EDID-box, telling the PC that my TV is HD. Then I get 1920x1080 in 24-60Hz. But still the computer scales image to the "new" screen resolution indicated by the EDID box.

I would like to get via HDMI 1.4a output:

3840x2160 in 24-30Hz

1920x1080 in 24-60Hz

1280x720 in 24-60Hz.

Why is this impossible? This issue seems to be new with Windows 10. If I remember correctly the output from same computer gave 720p out to screen when selecting this; not 720p upscaled to 1080p.

[idata]

Hi TGBerland,

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 HzY-Processors: 2560 x 1600 @ 60 Hz HDMI*: 4096 x 2304, 3840 x 2160 @ 24 Hz / 24bpp DVI: 1920 x 1200 @ 60 Hzhttps://software.intel.com/en-us/articles/quick-reference-guide-to-intel-processor-graphics https://software.intel.com/en-us/articles/quick-reference-guide-to-intel-processor-graphics If problem continues, let me know your system configuration. Send to me the results of Intel® System Support Utility.https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility?product=91600 https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility?product=91600 How to attach a file:-Click on reply-Click Use advanced editor (upper right side)-Click Attach (lower right hand) Regards,Mike C

[idata]

Hi TGBerland,

I am following up on your case. Let me know if I can help you with anything else. Regards,Mike C