Unable to enter loader mode after image is flashed

2026-04-04 12:08

Hi

I was able to successfully flashed image. The image was wrong so I tried to flash another one.
However, I am not able to enter into loader mode again.
I unplug USB type c cable, pressed BOOT button, then plug in USB type c cable again, and hold the BOOT button for 10s. My Linux still can't detect the Luckfox USB device:
~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

I am seeing this error in dmesg :
[48293.742471] audit: type=1400 audit(1775303566.924:726): apparmor="DENIED" operation="open" class="file" profile="snap.firefox.firefox" name="/proc/pressure/memory" pid=4980 comm="MemoryPoller" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

Do I need to clear the image first in order to enter to boot loader mode again?

Please help me out.

pete

2026-04-04 12:41

I flashed image successfully, but the image was wrong.
I tried to flash again, but I can't get to loader mode anymore.

I did (1) press HOLD, (2) unplug usb power (3) plug usb power (4) continue for 10 mins.
I can see green light up.

luckfox is not showing in lsusb

Could someone please help me?
There is this error in dmesg:
[49474.474714] audit: type=1400 audit(1775304747.665:781): apparmor="DENIED" operation="open" class="file" profile="snap.firefox.firefox" name="/proc/pressure/memory" pid=4980 comm="MemoryPoller" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

2026-04-13 3:54

The loaders for RK3506B and RK3506G images are different. If you flash the wrong one, the device will permanently use the incorrect loader afterward. The only fix is to enter MaskRom mode via short‑circuit and flash the correct image (see: https://wiki.luckfox.com/Luckfox-Lyra/Image-flashing).
If this is not your case, please specify your Luckfox Lyra model and the name of the flashed image.