Re: [REGRESSION] aquantia: Sunshine/Moonlight UDP video streaming broken since 5b4015ad833c ("net: aquantia: Remove redundant UDP length adjustment with GSO_PARTIAL")

[Gal Pressman <gal@nvidia.com>]

On 06/05/2026 10:49, Matthew Schwartz wrote:
> 
> 
>> On May 5, 2026, at 8:05 AM, Gal Pressman <gal@nvidia.com> wrote:
>>
>> On 27/04/2026 21:26, Matthew Schwartz wrote:
>>>> On 4/27/26 11:09 AM, Gal Pressman wrote:
>>>> Hello Matthew,
>>>>
>>>> On 27/04/2026 2:20, Matthew Schwartz wrote:
>>>>> Hello,
>>>>>
>>>>> When using a previously working setup of remote streaming from my workstation to another device via Sunshine (the host server) and Moonlight (the client app) on my home network, I no longer receive any video output on the client app after upgrading my host workstation to kernel 7.0. Reverting back to kernel 6.19 on the host restored my setup to a working state.
>>>>>
>>>>> After bisecting, I landed on 5b4015ad833c ("net: aquantia: Remove redundant UDP length adjustment with GSO_PARTIAL") as the first bad commit. I confirmed this by moving the cable to my second on-board NIC (Intel) on the same workstation, which restored video output without any other kernel changes. My affected on-board NIC is Aquantia AQC113 [1d6a:04c0] (rev 03), atlantic driver, firmware 1.3.34, MTU 1500.
>>>>>
>>>>> Looking into it a bit further, ethtool -K enp97s0 tx-udp-segmentation off also serves as a workaround on my Aquantia port without changing to my other ethernet port. The working Intel NIC reports tx-udp-segmentation as "off [fixed]", so traffic falls back to software UDP segmentation on there.
>>>>>
>>>>> Please let me know if there's any additional info I can provide.
>>>>>
>>>>> Thanks,
>>>>> Matt
>>>>>
>>>>> #regzbot introduced: 5b4015ad833c
>>>>
>>>> Thank you for the report and the bisect!
>>>>
>>>> I will take a look and try to figure out what's wrong (though I don't
>>>> have real hardware to test on).
>>>> Is the userspace app open source? can I see its code and try to run it
>>>> myself?
>>>
>>> Thanks for the reply. The code for Sunshine is available here: https://github.com/LizardByte/Sunshine and the code for Moonlight is here: https://github.com/moonlight-stream/moonlight-qt.
>>>
>>> I have been using the Arch Linux Sunshine package which I installed by following the Linux instructions here: https://docs.lizardbyte.dev/projects/sunshine/latest/md_docs_2getting__started.html, but there are also binaries for other distros or it's buildable from source. For Moonlight, I have been using the Flatpak distributed on Flathub because the client device runs an atomic rootfs, but you can also use any other device that Moonlight supports.
>>>
>>>>
>>>> I will be OOO for the rest of the week, hope to have some meaningful
>>>> reply by the end of next week.
>>>
>>
>> I think I see the issue, do you mind testing the following diff?
> 
> Sorry for the delay. I applied this diff and I’m able to stream from my host to clients again without any issues.
> 
> If you send this version upstream, feel free to add my Tested-by to it.

Thanks for verifying!

I will finalize this and submit a proper patch soon.