Booting only with HDMI without success.
The issue ist also with original bootloader (03.09.2020)
Bootloader (started from working image, from there I updated the bootloader)
> uname -a
Linux raspberrypi 5.10.17-v7l+ #1403 SMP Mon Feb 22 11:33:35 GMT 2021 armv7l GNU/Linux
> sudo rpi-eeprom-update
BCM2711 detected
VL805 firmware in bootloader EEPROM
Checking for updates in /lib/firmware/raspberrypi/bootloader/default
Use raspi-config to select either the default-production release or latest update.
BOOTLOADER: up-to-date
CURRENT: Do 18. Mär 08:54:11 UTC 2021 (1616057651)
LATEST: Do 3. Sep 12:11:43 UTC 2020 (1599135103)
RELEASE: default
VL805: up-to-date
CURRENT: 000138a1
LATEST: 000138a1
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Working cmdline.txt from Linux raspberrypi 5.10.17-v7l+
boot=UUID=1103-0809 disk=UUID=9ee2217f-7b96-4eee-8977-167cca3a35d6
Not working cmdline.txt from LE V9.2.6
boot=UUID=2410-0508 disk=UUID=09814adf-0b3e-462b-ad3f-abd8815b9b92 initcall_debug=1 loglevel=8