Hardware issues with Rock64

[t4_4t]

I don't usually use "Armbian" so I'm not familiar with this distribution.
But, you referred to "Armbian" as a concrete example.
So I decided to list the results I confirmed about "Armbian" that below.
The result is as follows.

Armbian: 2020-09-03 -> Now version

Code:

o U-Boot:bsp(maybe) Armbian_↑↑ (More older version)
o U-Boot:bsp        Armbian_20.08.1_Rock64_focal_current_5.8.6.img.xz   (2020-09-03)
cpuid#=55524b503039303036000000000xxxxx

x U-Boot:main_line  Armbian_20.11_Rock64_focal_current_5.9.10.img.xz    (2020-11-25)
x U-Boot:main_line  Armbian_20.11.3_Rock64_focal_current_5.9.14.img.xz  (2020-12-12)
x U-Boot:main_line  Armbian_20.11.6_Rock64_focal_current_5.9.14.img.xz  (2021-01-05)
x U-Boot:main_line  Armbian_20.11.10_Rock64_focal_current_5.9.14.img.xz (2021-01-25)
cpuid#=00000000000000000000000000000000

o U-Boot:main_line  Armbian_21.02.1_Rock64_focal_current_5.10.12.img.xz (2021-02-04)
o U-Boot:main_line  Armbian_21.02.3_Rock64_focal_current_5.10.21.img.xz (2021-03-09)
cpuid#=55524b503039303036000000000xxxxx

Debian: 20210408-02:17/netboot/SD-card-images

Code:

U-Boot TPL 2021.01+dfsg-4 (Mar 12 2021 - 23:00:43)
LPDDR3, 800MHz
BW=32 Col=11 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=4096MB
Trying to boot from BOOTROM
Returning to boot ROM...

U-Boot SPL 2021.01+dfsg-4 (Mar 12 2021 - 23:00:43 +0000)
Trying to boot from MMC1
NOTICE:  BL31: v2.4(debug):
NOTICE:  BL31: Built : 01:29:49, Jan 17 2021
NOTICE:  BL31:Rockchip release version: v1.2
INFO:    ARM GICv2 driver initialized
INFO:    plat_rockchip_pmu_init: pd status 0xe
INFO:    BL31: Initializing runtime services
INFO:    BL31: cortex_a53: CPU workaround for 855873 was applied
WARNING: BL31: cortex_a53: CPU workaround for 1530924 was missing!
INFO:    BL31: Preparing for EL3 exit to normal world
INFO:    Entry point address = 0x200000
INFO:    SPSR = 0x3c9


U-Boot 2021.01+dfsg-4 (Mar 12 2021 - 23:00:43 +0000)

Model: Pine64 Rock64
DRAM:  4 GiB
PMIC:  RK8050 (on=0x50, off=0x10)
MMC:   mmc@ff500000: 1, mmc@ff520000: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial@ff130000
Out:   serial@ff130000
Err:   serial@ff130000
Model: Pine64 Rock64
Net:   eth0: ethernet@ff540000
Hit any key to stop autoboot:  0

=> printenv cpuid#
cpuid#=4054f3fc000000003cabf5fe00000000

# xxd /sys/bus/nvmem/devices/rockchip-efuse0/nvmem
00000000: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000010: 0000 0000 0000 0000 0000 0000 0000 0000 ................

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I'm not an English speaking person.
Therefore, my English ability cannot accurately understand the following content that you insist.
So I have nothing to comment on.

> However this also shows the heart of the problem here:
> ...
> ... "the wrong fork" or an actual hardware problem.