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#1 2021-01-11 06:42:48

ouyang
Member
Registered: 2019-11-02
Posts: 10

What's the difference between raspberry pie 4B 1.4 and 1.2

Now I come across a problem when I use raspberry pi 4B 1.4. The output HDMI can't support 4K LCD screen. It's normal to use 2K LCD screen instead.

After I changed to raspberry pi 4B 1.2, it can support 4K. When I upgraded it, I found that it doesn't support 4K. Have you ever met this problem? Is it the system?

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#2 2021-01-11 11:02:54

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,518

Re: What's the difference between raspberry pie 4B 1.4 and 1.2

You should limit output to one HDMI using :0= syntax. All versions support 4K even pi3

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#3 2021-01-11 15:36:39

ouyang
Member
Registered: 2019-11-02
Posts: 10

Re: What's the difference between raspberry pie 4B 1.4 and 1.2

Shahin wrote:

You should limit output to one HDMI using :0= syntax. All versions support 4K even pi3

I tested it again this afternoon and it turned out to be wrong. The real output resolution is 1920 * 1080. I start 4K output enable, restart the printer, through the screen to observe. The boot interface is normal, but after boot, I click the screen calibration. In 1920 * 1080 LCD screen normal display, when I change to 3840 * 2160 LCD can not display any information.

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