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Date: Fri, 01 Dec 2023 15:40:21 -0800
From: Vinicius Costa Gomes <vinicius.gomes@...el.com>
To: Ferenc Fejes <fejes@....elte.hu>, netdev <netdev@...r.kernel.org>
Cc: "anthony.l.nguyen" <anthony.l.nguyen@...el.com>, Jesse Brandeburg
 <jesse.brandeburg@...el.com>, "Neftin, Sasha" <sasha.neftin@...el.com>
Subject: Re: BUG: igc: Unable to select 100 Mbps speed mode

Hi,

Ferenc Fejes <fejes@....elte.hu> writes:

> Hi!
>
> I upgraded from Ubuntu 23.04 to 23.10, the default Linux version
> changed from 6.2 to 6.5.
>
> We immediately noticed that we cannot set 100 Mbps mode on i225 with
> the new kernel.
>
> E.g.:
> sudo ethtool -s enp4s0 speed 100 duplex full
> dmesg:
> [   60.304330] igc 0000:03:00.0 enp3s0: NIC Link is Down
> [   62.582764] igc 0000:03:00.0 enp3s0: NIC Link is Up 2500 Mbps Full
> Duplex, Flow Control: RX/TX
>

I wonder if this patch fixes it, and it is still not available in your
distro:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e7684d29efdf37304c62bb337ea55b3428ca118e

> I just switched back to 6.2 and with that it works correctly.
>
> Sorry if this has already been addressed, after a quick search in the
> lore I cannot find anything related.
>

I think it was discussed here:

https://lore.kernel.org/all/20230922163804.7DDBA2440449@us122.sjc.aristanetworks.com/

> Best,
> Ferenc
>


Cheers,
-- 
Vinicius

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