on a fresh installation of OS 16 I could set the correct screen rotation to landscape in KDE.
But this only woks after login. This means that up to the login to the desktop session the screen stays in protrait for login screen, console, boot output.
Is it in the meantime possible to have the screen rotated to landscape from the beginning?
with fbcon=rotate:1 at the boot screen I could get a rotated console.
but how can I make it permanent?
I tried
update-bootloader --add-option fbcon=rotate:1
but it had no effect
You missed to use the config command which updates the bootloader config after adding the option…
sudo update-bootloader --add-option fbcon=rotate:1
sudo update-bootloader --config