Tesla Android CM4 Bandwidth Limitations

[NegativeAnimosity]

I'm running into download speed issues on CM4 Tesla Android using any tethering. It almost seems software related. If I use a mobile tether I get a hard locked 15mb down and over 200mb upload. Same connection on windows PC, 300mb down, 200mb up.
I have tried using HDMI to pi, and in the Tesla using the browser with hotspot and the connection is just throttling for some reason.

Note its not carrier throttling as I am sharing my wifi fiber connection behind a router.

Any ideas? Drivers? Setting etc?

[mikegapinski]

I've seen this issue raised a couple of times recently, has to be software. I got it reproduced by quickly running an iperf3 via ethernet to one of my local servers. I'll tweak some settings and get back to you

[mikegapinski]

a more "real life" result (since we're bottlenecked by the Wi-Fi performance on the Pi)

Before:

After:

[NegativeAnimosity]

This is very promising. I tried to run myself but it's only available in temporary root and gets removed when rebooting.
Can you implement the change for an OTA update?

[mikegapinski]

100%, just need to run some more tests and figure out if this is just a RX-side bottleneck or there is more to it like RX offloads etc

[mikegapinski]

Please test the 2025.51.1 beta (https://beta.device.teslaandroid.com) if you are on production now

[NegativeAnimosity]

I am still having the same issue with the new beta update. (see below post). Please let me know how to proceed.

[NegativeAnimosity]

Tried beta update.
Same result, not terrible with USB tether to pixel 10 pro xl...

But this is the one that bothers me, the 4g modem (gets 50mb+ on windows PC)

[NegativeAnimosity]

Just for confirmation...