WD My Cloud Home Duo - Install of a new kernel

Hi,

I have installed debian12 on this Cloud Duo and it works fine.

Now, I try to make and install of a new kernel, but i cannot find any howto or tips, to do this.
For now, all i have tried, the kernel isnt able to boot.

The options of a baking kernel is ok, but then? Got the gpl-files from WD, kernel 4.9.233

fwtutil -r 5:/mnt/emmc.uImage -r 12:/mnt/emmc.uImage -r 8:/mnt/linux/rootfs2.bin -r 9:/mnt/linux/rootfs2.bin -r 6:/mnt/rescue.emmc.dtb -r 7:/mnt/rescue.emmc.dtb

That is at the end of the debian install i used. Maybe anyone knows better about, like the kernelimage and dtb-files. I could give more informations about the maschine, if neccesary.

Thanx.

@User1223,

Do you have serial console connected? It'll be good to see the boot log, ie. specs of this box (to create DTS file or matching it with an existing DTS).

-bodhi
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No, there is no serial connection. I made a boot script for logging.. Nearly everthing is working, raid etc. But the network-card has no link (green LED is working). Speed: 10Mb/s, Duplex: Half ?
So, every test of booting the system, i have to restore the data of emmc, when it fails again.....

--- Status für eth0 ---
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 10Mb/s
        Duplex: Half
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: no

and the rest of dmesg:

[   32.792506] Adding 3142652k swap on /dev/md0.  Priority:-1 extents:1 across:3142652k
[   32.952087] EXT4-fs (md1): mounted filesystem with ordered data mode. Opts: (null)
[   33.258720] random: crng init done
[   34.908563] EXT4-fs (md1): re-mounted. Opts: (null)
[   35.426657] EXT4-fs (md1): re-mounted. Opts: errors=remount-ro
[   36.859306] r8169 98016000.gmac eth0: rtl_csiar_cond == 0 (loop: 100, delay: 10).
[   36.868285] r8169 98016000.gmac eth0: rtl_csiar_cond == 1 (loop: 100, delay: 10).
[   36.877192] r8169 98016000.gmac eth0: link down
[   36.877208] r8169 98016000.gmac eth0: link down
[   36.886666] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   38.360385] cgroup: cgroup2: unknown option "nsdelegate"
[   38.377834] elogind-daemon[2519]: New seat seat0.

kernel 4.9.233 from WD-gpl. Thanks.

> No, there is no serial connection.

Without serial console, I don't think it's possible for me to help booting the latest Debian kernel.

-bodhi
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Thanks for your answer.

Quote

I don't think it's possible for me to help booting

It is not, that I would need help for booting a kernel or the configuration to start correct. I think I am doing
something wrong handling the tools like 'fwtutil'. Sadly, there no hints about the EMMC of the cloud duo.
When someone build a kernel for this machine and its working, fine. So i have to do more try and error.



Edited 1 time(s). Last edit at 02/18/2026 01:49AM by User1223.