Hi all,

I can netboot my Raspberry Pi 4 still fine, but when I flash the image onto a 
usb drive using wic, booting fails. I just stops to boot at one point. I'd be 
glad if someone could tell me where it's hanging so I could try to start 
tracking it down at the right place. All metalayers are on dunfell but not at 
the newest commit.

USB booting was working fine months ago and I don't really know at which point 
it stopped working.

This is the last I get from the serial console:

    Read config.txt bytes    36302 hnd 0x00000035 
    Read start4.elf bytes  2229120 hnd 0x000025f8 
    Read fixup4.dat bytes     5448 hnd 0x0000004b 
    Firmware: 7d9a298cda813f747b51fe17e1e417e7bf5ca94d May 27 2021 14:02:15
    0x00d03114 0x00000000 0x000000ff
    MEM GPU: 76 ARM: 947 TOTAL: 1023
    Starting start4.elf @ 0xfeb00200 partition 0
    Stopping network
    Stop display
    Display stopped
    +

The rest sadly appears on the screen only, so here is an actual screenshot:

    https://user.fm/files/v2-1d64d080db788dec685957ae4863e1f4/raspi.png

It seems to detect the usb drive just fine. The last related log line I get is

    sd 0:0:0:0: [sda] Attached SCSI removable disk

Whatever is running (the kernel?) is not dead, though. Around 30 seconds later 
it prints a "vcc-sd: disabling" and some minutes later a "random: crng init 
done" (= random number generator is initialized).

Does anyone have an idea? I'll try to get my hands on an sd card in the 
meantime.

Regards,
Manuel
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