Re: [leaf-user] Raspberry pi computer module 5 on a CM5-DUAL-ETH-MINI

[jeanrocco jr <bla...@gm...>]

Hello Erich and List members,

On Thu, Sep 10, 2026 at 10:15 AM Erich Titl <eri...@th...> wrote:

> Hi Jeanrocco
>
> Am 10.09.2026 um 07:14 schrieb jeanrocco jr:
> > Hello list,
> >
> > I was just wondering if anyone has looked at this combination of a 50$
> dual
> > ethernet module with a ~125$ Pi CM5 module. The speed is interesting:
> from
> > the AI;
> >
> > The <https://www.waveshare.com/wiki/CM5-DUAL-ETH-MINI>
> > <https://www.waveshare.com/wiki/CM5-DUAL-ETH-MINI>
> > <https://www.waveshare.com/wiki/CM5-DUAL-ETH-MINI>
> > <https://www.waveshare.com/wiki/CM5-DUAL-ETH-MINI>
> > <https://www.waveshare.com/wiki/CM5-DUAL-ETH-MINI>CM5-DUAL-ETH-MINI
> > <
> https://www.google.com/search?ibp=oshop&prds=pvt:hg,pvo:48,mid:576462537342168217,imageDocid:10792043317969740387,gpcid:17263125341985945869,headlineOfferDocid:6156489124378725664,catalogid:15090230984502132419,productDocid:13645643557539667634&q=product&sa=X&ved=2ahUKEwi0-rv1u-KWAxX0vokEHW7bNpMQxa4PeggIAggBCAkQAw
> >
> > base board delivers full gigabit speeds (up to 1000Mbps) across its dual
> > RJ45 ports, with Ethernet 0 running on the native CM5 controller and
> > Ethernet 1 running via an extended PCIe RTL8111H Gigabit NIC chip
> > <
> https://www.pishop.ca/product/mini-dual-gigabit-ethernet-mini-base-board-for-raspberry-pi-compute-module-5/
> >
> > .
> >
> > Installing LEAF on this requires some recompiling though:
> > Because the precompiled LEAF images do not natively bundle the BCM2712
> > kernel or the specific Realtek PCIe Ethernet drivers out of the box,
> > flashing a standard Raspberry Pi LEAF image will likely result in a
> failed
> > boot or an unrecognized second network interface.
>
> Why do you need the kernel to be recompiled? I guess loading the
> required module for eth1 should be enough.
>

LEAF does not support the Pi 5 yet, we support up to the Pi 4. I think KP
mentioned that the cross compilation for the Pi 4 went well
so it would not be too much of a task to do it for the Pi 5. Of course KP
has to decide if it's important enough ...

>
> >
> > The AI also tells me:
> > If you are determined to use LEAF for its excellent memory-resident
> > properties and Shorewall packaging, you must cross-compile it yourself.
> > .  You will need to download the LEAF source tree and modify its
> toolchain
> > configuration to compile against the official Raspberry Pi Linux Kernel
> tree
> > <https://github.com/raspberrypi/linux> targeting bcm2712.
> > . Ensure that the CONFIG_R8169 or CONFIG_RTL8111 driver is compiled
> > directly into the kernel image (not just as a dynamic module) so that the
> > second Ethernet port initializes correctly on boot.
>
> I would not know why it could not be a kernel module. Some AI stuff?
>

Yes, probably some AI hallucination ... most of my post was reprinting what
the AI told me ...


>
> >
> > According to the same AI (Google's) OpenWrt and IPFire already provide a
> > native support.
> >
> > The AI also explains all the steps to compile everything but I was
> > wondering if LEAF would be willing to go that way.
>
> If you have the hardware (which I believe ist quite expensive)


On the contrary, I thought it was not that expensive, unless you do have
less expensive hardware to show me.

why not
> give it a go yourself. You just need to look if the module is not yet
> enabled in the toolchain for the raspi.
>

As I said earlier, LEAF does not support the Pi 5 yet. I would rather wait
for KP to make a standard LEAF distro for the Pi 5 the usual way, if he
ever decides it is worth the trouble.

Bye
Jeanrocco


> cheers
> ET
>
> --
> „Wer von seinem Tag nicht zwei Drittel für sich hat, ist ein Sklave.“
> ―Friedrich Nietzsche
>
>
>
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