They use a parade ps171 chip to achieve this however its not exactly plug and play on the mac you have to use switchresx. Active displayport either normal or mini 11 or 12 to hdmi converters can go up to 3840x2160 at 30hz thats 4k at 30hz.
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Mini displayport to hdmi resolution issue. Posted september 5 2015 original poster. Mdp to hdmi adapter. For example a mini displayport to dvi adapter cant be connected to a dvi to hdmi adapter. Supports 4k x 2k resolutions. If possible check to see if using a different display or a different adapter works. If your display has more than one video connection see if using another connection on the display works.
So then my girlfriend borrowed it used it with a 1080p monitor through hdmi. Today i received two displayport to hdmi cables that i had purchased recently. For example your tv likely has hdmi 14 connections which max out at 3820x2160 pixel resolution at 30 frames per second. Also fine it was at 1080p. She didnt install or uninstall anything. Refer to the issue 309 ive tested and can confirm it works only 30hz refresh rate though.
The cable came with the monitor lg 31mu97 and is dp to minidp mini end in the screen. I now brought it back plugged displayport back in and get mashed potato as a resolution 640x480. Simply use a passive mini displayport to hdmi cable without using the surface mini displayport to hdmi 20 adapter. Mini dp port supports dp v12 which is for 162 gbps 27 gbps 54 gbps link rates. If the mini displayport mdp connection on the display is used then the input selection of the on screen display osd will need to be changed to mdp. Make sure this fits by entering your model number.
Some of their concerns are that displayport hdmi cables may require the user to reconfigure their display settings or that the display is not completely in frame of the televisionmonitor or that they may need to use software to make it work properly. If youve gotten a new 4k monitor youre limited to 30fps. Hdmi port supports v14 resolution up to 4kx2k at 30hz 1920 x 12001080pfull hd 720p and flawless audio pass thru for uncompressed digital 71 51 or 2 channels. Try using a different cable that you know is in working order. I have an lg 25um56 ultrawide monitor that came with its own hdmi cable that i have been using til now. I have never had an issue with this connection.
Confirm the displayport dp configuration of the display if your system supports dp version 12 the monitor can display the resolution of 3840x2160 at 60hz. Im told windows works just fine on the same mac hardware.
Gallery of Mini Displayport To Hdmi Resolution Issue
