简介：2016 年 2 月后购买的 Dell P2415Q 和 P2715Q 显示器，支持 HDMI 2.0，但是默认启用的是 HDMI 1.4。
HDMI 2.0 默认没有启用
Dell P2415Q 和 P2715Q 显示器 的 HDMI 2.0 支持 4k@60Hz （译者注：HDMI 1.4 只支持 4k@30Hz），但是只有在 2016 年 2 月后购买（出厂）的显示器才有这个功能，而且出厂时 HDMI 2.0 默认是没有启用的。
2016 年 3 月前出厂的 Dell P2415Q 和 P2715Q 只支持 HDMI 1.4，如果你使用 HDMI 线缆的话只支持最大以 4k@30Hz 的分辨率显示，如果想使用 4k@60Hz，你必须使用 DP 线缆。
如何在 A03 版本的显示器上启用 HDMI 2.0
您可以使用以下步骤在 2016 年 2 月后出厂的显示器上启用 HDMI 2.0：
- 拔掉所有数据线缆（只留电源线）
- 断电后重新上电
- 选择
HDMI (MHL)输入 - 按住下图按钮 6~8 秒
- 一个启用或停用 HDMI 1.4 的对话框将会出现
- 选择要禁用 HDMI 1.4 支持的选项，并单击绿色复选标记旁边的按钮以确认选择
- 重新连接数据线
注意：恢复出厂设置会重新启用默认的 HDMI 1.4，如果需要再次启用 HDMI 2.0，需要重复上面步骤。
以下为英文原文。
Summary: "Dell P2415Q and P2715Q flat panel displays purchased after February 2016 have HDMI 2.0 capability but HDMI 1.4 is enabled by default".
HDMI 2.0 capability not enabled by default.
High Definition Multimedia Interface (HDMI) version 2.0 provides the user with 4k x 2k resolution capability @60hz for Dell P2415Q and P2715Q flat panel displays. This HDMI 2.0 capability is only available on P2415Q and P2715Q displays sold after February 2016, however HDMI 2.0 is not enabled from the factory.
Dell P2415Q and P2715Q flat panel displays purchased before March 2016, only support HDMI 1.4 and provide 4k x 2k (3840 x 2160 pixels) resolution @ 30 Hz using the HDMI cable connection. 4k x 2k @60Hz is available via DisplayPort connection on these displays.
How to enable HDMI 2.0 on the version A03 displays.
You can enable HDMI 2.0 in your P2415Q or P2715Q flat panel displays purchased after February 2016 using the following steps:
Unplug all video cables from the display. (Leave only the power connected to the display.)
Power on the display.
Select the HDMI (MHL) input option. (A floating dialogue box will appear.)
Press and hold the button associated with the Green check mark for 6 to 8 seconds.
A dialogue box appear that states HDMI 1.4 Enable/Disable
Select the option to Disable HDMI 1.4 support and press the button next to the green check mark to confirm the selection.
Re-connect the video cables to the display
NOTE: Performing a Factory Reset of the display in the On-Screen Display (OSD) menu (Open the OSD menu by pressing the button above the power button, then arrow down to and select Other, then arrow down to and select Factory Reset), will revert the display back to HDMI 1.4 and this change to HDMI 2.0 will need to be repeated.