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#1 2021-11-05 09:37:08

PropellerHat
Member
Registered: 2019-07-23
Posts: 35

4K settings for RPI4 (or 3, if working for real)

Hi everybody

Finally I have overcome the long prevailed problems and the printer project has notched ahead a bit, and now it is time to set the image on the panel right.

I´ve got a 17,3" 4K color panel with a separately sold controller, ordered form Alibaba. Now I see only a fraction of the sliced part (with too big dimensions) when starting to print (now without resin, of course). This is due to wrong settings in the config.txt file, right?

Does somebody have a 17,3" panel in his printer? If not, I am interested in all the HDMI related settings of ANY 4K panel printer.

Please share your settings smile

Thanks

-PropellerHat

Last edited by PropellerHat (2021-11-05 09:37:43)

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#2 2022-02-02 16:59:10

elliot
Member
Registered: 2016-04-28
Posts: 108

Re: 4K settings for RPI4 (or 3, if working for real)

I have the same issue with 4K and Optima projector for a while.

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#3 2022-02-12 07:12:48

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

Re: 4K settings for RPI4 (or 3, if working for real)

Do you use framebuffer or BCM (when you do not fill framebuffer, the BCM is the default mode on pi)?

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#4 2022-03-08 13:56:07

elliot
Member
Registered: 2016-04-28
Posts: 108

Re: 4K settings for RPI4 (or 3, if working for real)

I am using 2 framebuffer.

I have this working for 4K projector and RasPi4 now. It was an issue with some of the cross settings from the original when RasPi3 was forced to display 4K. I am happy to share working config but I think it would be different for the LCD panel.

E

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