Avaota A1 mainline first-boot excerpt
Captured from CH340 UART, 115200 8N1

U-Boot SPL 2026.07-dirty (Sep 01 2026 - 23:27:38 -0400)
DRAM: 4096 MiB
LYNX_RECOVERY_FEL: armed after boot device 2
Trying to boot from MMC2
LYNX_MMC_SAFE_IO: mmc=2 f_max=25000000 b_max=128
LYNX_MMC_FORCE_USER: mode=1 before_part_config=0x00 cached_hwpart=0
LYNX_MMC_FORCE_USER: boot1_ret=0 cached_hwpart=1
LYNX_MMC_FORCE_USER: user_ret=0 after_part_config=0x00 cached_hwpart=0
LYNX_MMC_DIAG: mode=1 part=0 base=0x60 offset=0x10 final=0x70
LYNX_MMC_DIAG: read sector=0x70 blksz=512

NOTICE:  BL31: v2.12.0(debug):b5de74a68

U-Boot 2026.07-dirty (Sep 01 2026 - 23:27:38 -0400)
CPU:   Allwinner A523 (SUN55I)
Model: Avaota A1
DRAM:  LYNX_RAM_TOP_SAFE: detected_top=0x140000000 usable_top=0x50000000
4 GiB
LYNX_MMC_SAFE_IO_DM: mmc=2 f_max=25000000 b_max=128 force_width=4
Scanning mmc 1:1...
Found /extlinux/extlinux.conf
Retrieving file: /Image
append: console=ttyS0,115200 earlycon root=/dev/mmcblk1p2 rootwait rw fsck.repair=yes net.ifnames=0
Retrieving file: /sun55i-t527-avaota-a1.dtb
Moving Image from 0x40080000 to 0x40200000, end=43310000
Starting kernel ...

[    0.000000] Linux version 7.2.0-avaota-a1-mainline
[    0.000000] Machine model: Avaota A1
[    1.878026] sunxi-mmc 4022000.mmc: initialized, max. request size: 2048 KB, uses new timings mode
[    2.098665] Waiting for root device /dev/mmcblk1p2...
[    2.222131] mmc1: new high speed DDR MMC card at address 0001
[    2.228778] mmcblk1: mmc1:0001 CJNB4R 58.2 GiB
[    2.235834]  mmcblk1: p1 p2
[    2.324013] EXT4-fs (mmcblk1p2): recovery complete
[    2.329942] EXT4-fs (mmcblk1p2): mounted filesystem
[    2.342115] VFS: Mounted root (ext4 filesystem) on device 179:2.

Starting network: Waiting for interface eth0,eth1 to appear............... timeout!
run-parts: /etc/network/if-pre-up.d/wait_iface: exit status 1
FAIL
Starting crond: OK
Starting dropbear sshd: OK

Avaota A1 mainline Linux / Buildroot 2026.05.1
avaota-a1 login:

# uname -a
Linux avaota-a1 7.2.0-avaota-a1-mainline #3 SMP PREEMPT aarch64 GNU/Linux

# cat /proc/cmdline
console=ttyS0,115200 earlycon root=/dev/mmcblk1p2 rootwait rw fsck.repair=yes net.ifnames=0

# cat /proc/partitions
major minor  #blocks  name
 179        0   61071360 mmcblk1
 179        1     245760 mmcblk1p1
 179        2     524288 mmcblk1p2
 179       32       4096 mmcblk1boot0
 179       64       4096 mmcblk1boot1

# mount | grep ' on / '
/dev/root on / type ext4 (rw,relatime)

# free -h
              total        used        free      shared  buff/cache   available
Mem:           3.8G        0.1G        3.7G

# ip link
lo
eth0
eth1
usb0

Note: This is a focused excerpt, not a byte-for-byte full serial capture.