I’m away from Pi5 but still searching and:
I done all changes in cmdlines.txt without succes, Pi5 not react like Pi4.
Last changes:
sudo nano /boot/firmware/cmdline.txt
was not possible because cmdline.txt is in /boot and I edit it on /boot directory.
Maybe here is problem??
Today morning I found this :
“NOTE: for Bookworm, the file is at /boot/firmware/cmdline.txt”
Maybe it is reason why Pi5 not react when I changed cmdline.txt??
What you think about it?? I will try later add copy of cmdlines.txt to /boot/firmware/
Edit:
I think that I’m on good way :
" Prior to Bookworm , Raspberry Pi OS stored the boot partition at /boot/ . Since Bookworm , the boot partition is located at /boot/firmware/ ."
Can you check it in docs??