Display of octoscreen cut in middle and in wrong orientation

[HugoBarjot]

Hello, I installed last version of Raspberry OS with an hyperpixel 4.0 touch.

I setup the hyperpixel screen orientation of my raspberry PI 4 in landscape position with header (Pin connection) on bottom by adding that one line:

dtoverlay=vc4-kms-dpi-hyperpixel4,rotate=90

The console text at boot appears in the correct orientation,but when octoscreen launch the screen display show a bug (i setup raspi to auto connect and use gui and installed lightdm).

It is the same issue that was mentionned in a previous issue here :
#371
i don't understand well the answer of one guy who said he solved that issue with that way (totally-manual-rotation : https://github.com/pimoroni/hyperpixel4?tab=readme-ov-file#totally-manual-rotation too me i installed a recent debian bulleye so i follow this step by adding just one line to setup touch screen orientation like so :

explain here : pimoroni/hyperpixel4#177

What do i need to do to solve that display bug ?

i appreciate any help :)