Unable to Rotate Display

Question

I recently purchased an 8.8in display from AliExpress (8.8inch IPS HSD088IPW1 Long strip display Stretched Bar HDMI compatible Display Aida64 monitor USB 5V Power Second Display Case) (https://www.aliexpress.com/item/2255800212199308.html?spm=a2g0o.order_detail.0.0.3b08f19cYBiazn&gatewayAdapt=4itemAdapt)

and found a semi-successful way to get it to display on a WaveShare website (https://www.waveshare.com/wiki/8.8inch_Side_Monitor#Work_with_Raspberry_Pi) by putting the below in the config.txt:

max_framebuffer_height=1920
hdmi_mode=87
hdmi_group=2
hdmi_force_mode=1
hdmi_timings=480 0 30 30 30 1920 0 18 6 6 0 0 0 60 0 66280000 3
gpu_mem=512 #Pi Zero series please change to gpu_mem=256

Now I want to rotate the display from portrait to landscape but display_rotate=1 doesn't work, nor does display_hdmi_rotate=1, display_lcd_rotate=1 or lcd_rotate=1. I've also attempted adding the three display rotate entries and flipping the hdmi_timings= values.

Raspberry Pi 3 B+ using Raspberry Pi OS Bullseye (Lite)

Answer 1

I found the answer in a Reddit thread, turns out I had to comment out dtoverlay=vc4-fkms-v3d

Thanks to the user jdpg265 on this thread: https://www.reddit.com/r/octoprint/comments/if65es/unable_to_rotate_7inch_raspberry_pi_touch_screen/

ultimate config file entries look like this after commenting out the above:

max_framebuffer_width=480
max_framebuffer_height=1920
hdmi_mode=87
hdmi_group=2
hdmi_force_mode=1
hdmi_timings=480 0 30 30 30 1920 0 18 6 6 0 0 0 60 0 66280000 3
gpu_mem=256
display_rotate=1