netdev - Re: r8169 not working on 5.2.0rc6 with GPD MicroPC

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Date:   Mon, 1 Jul 2019 00:21:11 +0200
From:   Karsten Wiborg <karsten.wiborg@....de>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Cc:     nic_swsd@...ltek.com, romieu@...zoreil.com, netdev@...r.kernel.org
Subject: Re: r8169 not working on 5.2.0rc6 with GPD MicroPC

Hi Heiner,

On 30/06/2019 23:55, Heiner Kallweit wrote:
> This one shows that the vendor driver (r8168) uses a random MAC address.
> Means the driver can't read a valid MAC address from the chip, maybe due
> to a broken BIOS.
> Alternatively you could use r8169 and set a MAC address manually with
> ifconfig <if> hw ether <MAC address>
Hmm, did some more testing:
did a rmmod r8168 and (after "un"blacklisting the r8169) modprobed the
r8169. This time r8169 came up nicely but with a complete different MAC
(forgot to not than one though).
So I guess the vendor compilation did other stuff besides just compiling
the r8168 kernel module.

Did another test:
blacklisted the r8168, renamed r8168.ko to r8168.bak, depmod -a and
powercycled the system. Funny it came up with both r8168 and r8169
loaded and I got my intended IP address from. DHCP, so r8168 somewhat
got loaded and used his MAC.
Did another rmmod r8168, rmmod r8169 and then modprobe r8169.
Even though I did NOT configure a MAC address myself manually it came up
with a new MAC address and of course got a dynamich IP address.
So I don't know where the vendor somewhat changed something (with his
compiling/installing) to the effect that r8169 now works?!?

Regards,
Karsten

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