Display rotated -> qt/qml application not visible

[MHermann]

Hi all,

I have a Raspberry Pi 4B with Raspbian Buster Lite.
I have a qt/qml (512.7) application that is running quite fine.

Now I have changed the display from 1280x800 to 1920x515. And the display is rotated 180°.
Since then I have the problem that my application is running, but not visible on the screen.

Any ideas how I can solve this problem?

[MHermann]

Changes in /boot/config.txt solved this problem.

[jsulm]

@MHermann Did you check the application output (any warnings/errors)?

[MHermann]

You are right.
I found the line: No modes available for output "HDMI1"

Has someone any ideas how to solve this?

[MHermann]

Changes in /boot/config.txt solved this problem.