netdev - Re: igb driver: i210 (8086:1533) very bad SNR performance

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Message-ID: <66d96956-e393-41e6-952a-3f23ebcd3a79@intel.com>
Date: Wed, 23 Oct 2024 15:38:11 +0200
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Stefan Dimitrov <stefan.k.dimitrov@...il.com>
CC: <netdev@...r.kernel.org>, "intel-wired-lan@...ts.osuosl.org"
	<intel-wired-lan@...ts.osuosl.org>
Subject: Re: igb driver: i210 (8086:1533) very bad SNR performance

On 10/19/24 14:39, Stefan Dimitrov wrote:
> Hello All,
> 
> I am reporting the problem only, because the exact same
> environment/setup is working perfectly in Win7 with Intel driver
> version 12.13.27.0 from 7/8/2019 (I guess that is the latest driver
> version for Win7 as it is not supported for years, but it's the only
> Windows version I had during my tests).
> 
> So, in very short: the same 20-25m of UTP cable, works perfectly in
> Win7 and not at all in Linux with i210/igb driver and my best guess is
> PHY initialization in the Linux driver compared to the one in Win7
> drivers somehow reduces dramatically the Signal-to-Noise performance.



> P.S. it seems i217 (8086:153a and 8086:153b) is also affected, at
> least based on my very short and not extensive tests I did today.
> 
> thanks,
> stefan
> 

Thank your for the report, I will dispatch it within Intel, we will
communicate the progress here.

It will be beneficial for us to know the firmware version used both
on Linux and Windows setups.

For future reports, consider also CCing the IWL mailing list to get
faster responses.

Best Regards,
Przemek