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Last active November 3, 2025 00:01
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GeForce Now 1440P on Linux Chrome
import json
import re
from mitmproxy import http
url_pattern = re.compile(r"^.*\.nvidiagrid.net/v2/session")
user_agent_pattern = re.compile(r"(Mozilla\/[\d\.]+) \(.+?\)")
def request(flow: http.HTTPFlow) -> None:
# Check if the request matches the regex pattern
if url_pattern.match(flow.request.pretty_url):
flow.request.headers['nv-device-os'] = 'WINDOWS'
flow.request.headers['sec-ch-ua-platform'] = '"WINDOWS"'
flow.request.headers['sec-ch-ua-platform-version'] = '14.0.0'
if "user-agent" in flow.request.headers:
flow.request.headers["user-agent"] = user_agent_pattern.sub(
r'\1 (Windows NT 10.0; Win64; x64)',
flow.request.headers["user-agent"])
if flow.request.headers.get("content-type") == "application/json":
try:
body = json.loads(flow.request.content)
if body.get("sessionRequestData", {}).get("clientRequestMonitorSettings", None) is not None:
body["sessionRequestData"]["clientRequestMonitorSettings"] = [
{
"heightInPixels": 1440,
"framesPerSecond": 120,
"widthInPixels": 2560
}
]
flow.request.content = json.dumps(body).encode("utf-8")
except json.JSONDecodeError:
pass
function FindProxyForURL(url, host) {
var proxy = "PROXY <your proxy server IP>:<your proxy server port>";
if (/^https:\/\/.+\.nvidiagrid.net/.test(url)) {
// Should only proxy /v2/session, but the URL path is removed by Chrome
return proxy;
}
return "DIRECT";
}
@SebastianFalborg
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I have tested this with the Nvidia GeForce app, Microsoft Edge and Google Chrome.
I have followed the guides completely, but it still isn't working.
The problem is that the requests the script intercepts, doesn't have content, so it can't replace that.
I have tried just changing the script so it just replaces the headers, and I see it getting replaced with "WINDOWS", but this doesn't change anything.
Could it be a regional thing?
I am from Denmark.

@kubrickfr
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kubrickfr commented Jun 26, 2025

I have tested this with the Nvidia GeForce app, Microsoft Edge and Google Chrome.

How do you run Microsoft Edge on Linux? This hack is to allow Linux users to run at resolutions above 1080p, if you're already on Windows, this will do nothing for you.

@SebastianFalborg
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I have tested this with the Nvidia GeForce app, Microsoft Edge and Google Chrome.

How do you run Microsoft Edge on Linux? This hack is to allow Linux users to run at resolutions above 1080p, if you're already on Windows, this will do nothing for you.

https://www.microsoft.com/en-us/edge/download?form=MA13FJ
You can just download it here. There is a deb file.
It is also available as a Flatpack on Flathub.

@kubrickfr
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Ok, I didn't know that. I'm using it with the EU Central servers, it works well for me.

@SebastianFalborg
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SebastianFalborg commented Jun 26, 2025

This is my GET to https://prod.cloudmatchbeta.nvidiagrid.net/v2/session

GET /v2/session HTTP/1.1
Host: prod.cloudmatchbeta.nvidiagrid.net
Connection: keep-alive
nv-client-type: BROWSER
authorization: ....
sec-ch-ua-platform: "WINDOWS"
x-device-id: 5cb52e94-c699-43bd-8e32-6d018420c64d
sec-ch-ua: "Not)A;Brand";v="8", "Chromium";v="138", "Google Chrome";v="138"
sec-ch-ua-mobile: ?0
traceparent: 00-12da1eb766e07aabde28b923189007e8-c8cf635b03a8dcd1-01
nv-client-id: ec7e38d4-03af-4b58-b131-cfb0495903ab
nv-device-type: DESKTOP
content-type: application/json
nv-device-os: WINDOWS
nv-device-model: UNKNOWN
nv-client-streamer: WEBRTC
nv-browser-type: CHROME
nv-client-version: 2.0.75.146
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
nv-device-make: UNKNOWN
Accept: /
Origin: https://play.geforcenow.com
Sec-Fetch-Site: cross-site
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Accept-Encoding: gzip, deflate, br, zstd
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
sec-ch-ua-platform-version: 14.0.0

And this is the response

HTTP/1.1 200 OK
cache-control: private
content-type: application/json
server: Microsoft-IIS/10.0
x-aspnet-version: 4.0.30319
x-powered-by: ASP.NET
access-control-allow-origin: *
access-control-allow-headers: Content-Type, Authorization, Connection, User-Agent
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
date: Thu, 26 Jun 2025 08:45:58 GMT
content-length: 199
set-cookie: SERVERID=pm10_192_13_22; path=/

{"sessions":[],"requestStatus":{"statusCode":1,"statusDescription":"SUCCESS_STATUS","unifiedErrorCode":0,"requestId":"59d5bc54-247e-4a6a-8531-1ec3c3b41e25","serverId":"NP-SOF-02","countryCode":null}}

I feel like I have tried everything at this point. I am not sure what is wrong here.

@kubrickfr
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It's normal for most requests to not match the criteria, only one specific request at the start of the gaming sessions will be modified.

@SebastianFalborg
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@kubrickfr I feel like this is not really explained well anywhere. I was looking in the settings of GeForce Now, and it consistently showed 60 FPS and 1200p as max.
I have been trying this for so long.

@kubrickfr
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kubrickfr commented Jun 27, 2025 via email

@kubrickfr
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@SebastianFalborg
Settings:
image

In-game stats:
image

Again, do check that you have video acceleration properly enable in chrome

@SebastianFalborg
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@kubrickfr Sorry I was not clear. I understand how it works now.
I am getting 1440p 120fps in Witcher 3, and everything works.
But I was just frustrated because I have been trying absolutely everything to get the settings to show 1440p.
I don't feel like it was very well explained that it would look wrong in the settings, but correct in the game.

@FossPrime
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FossPrime commented Oct 13, 2025

https://chromewebstore.google.com/detail/modify-http-header/pefdbdgalcpplfidblkgpjlpggfepipd

Also works... .*\.(geforcenow\.com)|(nvidia\.com)|(nvidiagrid\.net)|(geforce\.com)
Screenshot From 2025-10-13 16-31-40

This leads to a playable 1440p at 45mbps... at 75mbps the input latency is rediculously high. On the same machine with wIndows, I can comfortably run 100mbps, strange as the fast.com loaded latency speed tests are very close between OSs. I tried Proton unsuccessfully.

@kubrickfr
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@FossPrime the reason why you're seeing high input latency is most likely because you don't have hardware acceleration.
See my previous comments: this one, that one

Nice that we don't need mitmproxy any more!

@fobiat
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fobiat commented Oct 15, 2025

https://chromewebstore.google.com/detail/modify-http-header/pefdbdgalcpplfidblkgpjlpggfepipd

Also works... .*\.(geforcenow\.com)|(nvidia\.com)|(nvidiagrid\.net)|(geforce\.com) Screenshot From 2025-10-13 16-31-40

This leads to a playable 1440p at 45mbps... at 75mbps the input latency is rediculously high. On the same machine with wIndows, I can comfortably run 100mbps, strange as the fast.com loaded latency speed tests are very close between OSs. I tried Proton unsuccessfully.

Any chance you could share more info on what you put on the headers? I've added "Chrome OS" & "CHROMEOS" but unable to identify the others but t;s not currently working thanks :)

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