I'm trying to run Ubuntu Core 20 on Raspberry Pi Zero 2 W.
According to Install Ubuntu on RPi this should work without a problem when using the 32bit version. Or with 64bit version using following procedure Ubuntu Server support for Zero 2 W.
I tried both options but my RPi Zero 2 W refuses to bootup -> according to LED code 7x blinks this means it's unable to find kernel.img.
Can I ask if someone has some idea or procedure on how to fix this?
Boot SD Card structure:
Folder PATH listing for volume ubuntu-seed
Volume serial number is 3227-A7E8
F:.
├───uboot
│ └───ubuntu
├───snaps
├───overlays
├───.disk
└───systems
└───20210630
├───assertions
├───snaps
└───kernel
└───dtbs
├───broadcom
└───overlays
PS F:\> ls
Directory: F:\
Mode LastWriteTime Length Name
---- ------------- ------ ----
d----- 6/30/2021 12:18 PM uboot
d----- 6/30/2021 12:18 PM snaps
d----- 6/30/2021 12:18 PM overlays
d----- 6/30/2021 12:18 PM .disk
d----- 6/30/2021 12:18 PM systems
-a---- 6/30/2021 12:18 PM 791356 start4cd.elf
-a---- 6/30/2021 12:18 PM 3176 fixup4cd.dat
-a---- 6/30/2021 12:18 PM 47761 bcm2711-rpi-400.dtb
-a---- 6/30/2021 12:18 PM 19840 bcm2837-rpi-cm3-io3.dtb
-a---- 6/30/2021 12:18 PM 733 config.txt
-a---- 6/30/2021 12:18 PM 5429 fixup4.dat
-a---- 6/30/2021 12:18 PM 3176 fixup_cd.dat
-a---- 6/30/2021 12:18 PM 20933 bcm2837-rpi-3-b-plus.dtb
-a---- 6/30/2021 12:18 PM 20513 bcm2837-rpi-3-b.dtb
-a---- 6/30/2021 12:18 PM 556936 uboot_rpi_arm64.bin
-a---- 6/30/2021 12:18 PM 8436 fixup4x.dat
-a---- 6/30/2021 12:18 PM 8440 fixup4db.dat
-a---- 6/30/2021 12:18 PM 47733 bcm2711-rpi-cm4.dtb
-a---- 6/30/2021 12:18 PM 4638 boot.scr
-a---- 6/30/2021 12:18 PM 7301 fixup.dat
-a---- 6/30/2021 12:18 PM 47600 bcm2711-rpi-4-b.dtb
-a---- 6/30/2021 12:18 PM 2940128 start.elf
-a---- 6/30/2021 12:18 PM 791356 start_cd.elf
-a---- 6/30/2021 12:18 PM 71191 psplash.img
-a---- 6/30/2021 12:18 PM 514944 uboot_rpi_3.bin
-a---- 6/30/2021 12:18 PM 4788712 start_db.elf
-a---- 6/30/2021 12:18 PM 26277 bcm2710-rpi-cm3.dtb
-a---- 6/30/2021 12:18 PM 3716808 start4db.elf
-a---- 6/30/2021 12:18 PM 117 cmdline.txt
-a---- 6/30/2021 12:18 PM 10288 fixup_db.dat
-a---- 6/30/2021 12:18 PM 28587 bcm2710-rpi-3-b-plus.dtb
-a---- 6/30/2021 12:18 PM 20064 bcm2837-rpi-3-a-plus.dtb
-a---- 6/30/2021 12:18 PM 3698952 start_x.elf
-a---- 6/30/2021 12:18 PM 10288 fixup_x.dat
-a---- 6/30/2021 12:18 PM 2975368 start4x.elf
-a---- 6/30/2021 12:18 PM 52456 bootcode.bin
-a---- 6/30/2021 12:18 PM 27968 bcm2710-rpi-3-b.dtb
-a---- 6/30/2021 12:18 PM 26470 bcm2710-rpi-2-b.dtb
-a---- 6/30/2021 12:18 PM 570336 uboot_rpi_4.bin
-a---- 6/30/2021 12:18 PM 2215776 start4.elf
-a---- 1/1/2022 7:45 PM 27137 bcm2710-rpi-zero-2.dtb
Folder PATH listing for volume ubuntu-boot
Volume serial number is 25E6-AC61
E:.
├───uboot
│ └───ubuntu
│ ├───pi-kernel_302.snap
│ │ └───dtbs
│ │ ├───broadcom
│ │ └───overlays
│ ├───pi-kernel_376.snap
│ │ └───dtbs
│ │ ├───broadcom
│ │ └───overlays
│ └───pi-kernel_377.snap
│ └───dtbs
│ ├───broadcom
│ └───overlays
└───device
