Starting steam remote play together kills internet, causing remote play to fail

[TheSentientCode]

Whenever I start a game and want to invite a friend to "remote play together", the moment I click that button, my internet goes down from a wired 1Gbps to 0.0Kbps on this PC. This results in my friend not being able to join and whatever internet I want to use not working (opening websites, trying speedtests, streaming music, steam friends list says disconnected, etc.).

What I noticed as well is that whenever I close the game, my full internet bandwidth comes back. Starting another game without remote play together still keeps my internet BUT starting the game that I once tried remote play together on will kill internet on startup of the game, regardless of clicking "Remote play together" again. (this will keep happening until PC restart, then it will kill internet on starting Remote play together again). System monitoring does not show abnormal behaviour, only a lack of traffic on the ethernet port during the remote play together moments.

Speedtests from my router to the outside keeps working as well as all my other devices, my firewalls say they have not blocked anything from this PC.

What I tried:
- Multiple different games
- Disabling hardware encoding in steam settings > remote play > advanced host options
- Enabling Qos for all traffic on this PC
- Disabling Qos
- Checking steam client updates (none detected)
- Replugging modem, router and wired connections to PC (just in case)
- Steam link from phone with the PC as host works
- Restarting PC
- Checked windows updates (up to date)
- Disabling firewalls and windows defender
- Starting Remote play together either via friends list > friend > start remote play together and friends list > remote play together > invite list > friend (also variations via steam overlay or directly steam itself)
- Limiting bandwidth for remote play together by reducing screen resolution to 1080p
- Turning off most other devices so that this PC does not have to compete for bandwidth (a 0.2Mbps throughput of all other devices together on a 1Gbps connection)
- Turning off all controllers (read somewhere that using different types of controllers might be problematic)

Games we tried:
- Vampire survivors (friend did connect here and could play for max 20 seconds)
- Overcooked 2 (friend did connect here, could play for only a few seconds)
- KeyWe (friend got a loading screen, not even the checkmark for connecting)
- Unrailed 2 (same as KeyWe)
In all instances my friend gets kicked out after the game hangs on loading or after x seconds, on my end corresponds with the exact moment my internet kills and speedtests go down.


Any Idea on what is going on here? My best guess is Remote Play together crashing and somehow overloading or occupying my network driver but I don't see crash reports or any form of feedback that remote play together or steam thinks that something went wrong.

[Iceira]

Use cable as much as possible to reduce wifi as much as possible to the pc. ( wifi to all device unit's only raise the bandwide issue to cover all.device unit's

ps.
We have seen other steam users mention have 20 device on home network, your wifi has never been build for that. ( we need to be rude here for steam user own sake, wifi was build for few unit not many that need bandwide ) and gaming require alot of steady small packets to keep get sync, many know this, problem is ( you also need none interference traffic with this, and thats the problem ) wifi is not a optimale gameing procedur if overloaded.

ps.
Alot easier today and say pro gamers do not use wifi at all. ( it's not our job to tell you best network setup )

Or ask own ISP.


And i dont care if you wifi router is old and not update with newest firmware, thats still yuo problem same goes with lan driver and othr thing you did not update BIOS Chipset driver to whatever pc you have on network.

And be happy to get a reply.. ( this is a your problem on own network and you have 2 option for network issue own ISP or steam in other end, no one here will even dare say this is steam issue at a datacenter where steam server stands, ( odds are so slim, then ask them you ask nicly if they can see and issue. ( what are the odds you should have a configurations issue on steam then they use same procedur to all steam gamers, but as i said we never know, and that why ask gentle because it dont make any sense then it work for all other, unless there is many steam user with this.

gl with it.


Dont forget i and other have work with network, huge diffrence, and we know wifi many cons, pros they are gone today, other then check mail onm remote device, that's the nicest thing i have to say about it.

[3ull5hit]

Me and my buddy also stumbled upon exact same problem. Nothing seems to fix it, and the funny part is it was working perfectly a month ago...

[Sicaris]

This is also happening to me. In my case the host is running Linux Mint and the client is an android tablet. Currently both on wifi (I'll try connecting host to Ethernet shortly), connection to the Internet shouldn't be required. What's interesting is that my router and modem are separate, the crash is the modem, not the router.

I'm also going to try moonlight and see if it is truly a bandwidth issue or just steam remote being a bit crap.