netdev - Re: [REGRESSION] 5.3-rc1: r8169: remove 1000/Half from supported modes

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Date:   Sat, 27 Jul 2019 12:27:22 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Bernhard Held <berny156@....de>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>
Subject: Re: [REGRESSION] 5.3-rc1: r8169: remove 1000/Half from supported
 modes

On 26.07.2019 22:45, Bernhard Held wrote:
> On 26.07.19 at 22:24, Heiner Kallweit wrote:
>> On 26.07.2019 22:16, Bernhard Held wrote:
>>> Hi Heiner,
>>>
>>> with commit a6851c613fd7 "r8169: remove 1000/Half from supported modes" my RTL8111B GB-link stops working. It thinks that it established a link, however nothing is actually transmitted. Setting the mode with `mii-tool -F 100baseTx-HD` establishes a successful connection.
>>>
>> Can you provide standard ethtool output w/ and w/o this patch? Also a full dmesg output
>> with the patch would be helpful.
>> Is "100baseTx-HD" a typo and you mean GBit? And any special reason why you set half duplex?
>>
> 
> The requested files are attached.
> 
Looks all normal. So it seems to be a HW issue with the integrated PHY (RTL8211B).
This PHY version is used also e.g. in RTL8168d. So better revert the original change.

> mii-tool doesn't offer GBit settings. I used HD only while playing around, both FD and HD are working.
> 
> Hope it helps!
> Bernhard
Heiner