Catch.Rahul
Posts: 10
Joined: Sun Jul 07, 2019 9:37 am

RPi4 - GUI display to hdmi0 & hdmi1

Wed Aug 28, 2019 5:02 am

Hello,
I am trying to display kivy GUI on hdmi1 connected screen, but unable to get it to work. Also, none of the values for KIVY_BCM_DISPMANX_ID seem to work.

Any suggestions to have GUI run on second display (hdmi1) maximized, while using hdmi0 screen for other purposes. thanks in anticipation!

jamesh
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Re: RPi4 - GUI display to hdmi0 & hdmi1

Wed Aug 28, 2019 7:20 am

Turning off the Kms driver would give you two framebuffer a, but you would lose HW acceleration for the desktop.
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Catch.Rahul
Posts: 10
Joined: Sun Jul 07, 2019 9:37 am

Re: RPi4 - GUI display to hdmi0 & hdmi1

Wed Aug 28, 2019 8:10 am

Thanks Jamesh!

is there any other workaround that may be used instead of turning off kms?

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Re: RPi4 - GUI display to hdmi0 & hdmi1

Tue Sep 03, 2019 1:45 pm

Catch.Rahul wrote:
Wed Aug 28, 2019 5:02 am
I am trying to display kivy GUI on hdmi1 connected screen, but unable to get it to work. Also, none of the values for KIVY_BCM_DISPMANX_ID
If you're referring to the values here, you missed the ID for the secondary HDMI output. It's value is 7. See here.
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