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Old 16-06-2024, 22:41   #1
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Rpi: Touchscreen "crashes" when screen orientation inverted

Hello.
Forgive me if this is not an OpenCPN issue, although I can only recreate it with OpenCPN. I have a 10.1" touch screen (cheap) which I mount upside down for better cabling runs. I therefore invert the screen orientation in the Rpi 5 screen preferences. In OpenCPN, if a pop up window appears (such as right click on a route and select delete, the warning "are you sure" dialog box appears or open general settings window) the HDMI screen goes garbled/blank/dark grey. Replugging the HDMI cable or power cycling the screen and it brings it back. The Pi is still accessible via SSH and appears not to be affected. This only happens when the HDMI signal is inverted (not it doesn't matter what the orientation of the screen is physically). It is most bizarre and I can't fathom what is causing it. I can see no odd output in xorg log or dmesg. I haven't been able to recreate this in any other software on the Pi, not that I have that much apart from OpenCPN anyway. I am baffled, any ideas would be appreciated.
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Old 21-06-2024, 02:13   #2
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Boat: Najad 34
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Re: Rpi: Touchscreen "crashes" when screen orientation inverted

Maybe if you rotate the screen at boot instead?
Like this:

https://howchoo.com/pi/raspberry-pi-display-rotation/
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