USB-C 3.0 cable being recognized as 2.0??!!?!? ON A 3.0 PORT

[N e c o]

So for some days now, I have been trying to hook up my Quest 3 to my PC using my 3.0 USB-C cable and now it shows up as 2.0 on the Oculus app and USB Device Tree Viewer.

 

At this point idfk what to do. I have tried Restarting the port, and flipping the cable over but nothing works. Sometimes I straight up connect as 3.0 but then after 20min I get a black screen on my Q3 and I have to connect again but when I do connect back it's now 2.0 instead of USB 3.0. Meta support is slow and is just copy-pasting solutions I have tried that don't work and I am tired of this bullcrapery.  This is my last resort

[Needfuldoer]

Does that cable (and port) give you reliable USB 3.0 speeds on another peripheral?

 

You're absolutely sure it's not one of those "charge only" cables that's got USB-C connectors but only the pins necessary for power and USB 2.0 are connected?

[N e c o]

Just now, Needfuldoer said:

Does that cable (and port) give you reliable USB 3.0 speeds on another peripheral?

 

You're absolutely sure it's not one of those "charge only" cables that's got USB-C connectors but only the pins necessary for power and USB 2.0 are connected?

Yes, I am sure it's not one of those "charge-only" cables since I have been using it for 2 months without issues until now since it gave me 2gbs speeds before (using the Oculus USB test)

[SlayerOfHellWyrm]

4 hours ago, N e c o said:

Yes, I am sure it's not one of those "charge-only" cables since I have been using it for 2 months without issues until now since it gave me 2gbs speeds before (using the Oculus USB test)

What is the cable you are using? Are you using any sort of extension or adapter with it? What are you plugging it into? (For instance, a USB hub that's externally powered, or the USB-C 20 Gbps port on the rear of my Super Cool Motherboard Model by Motherboard Company)

[DrMacintosh]

I'm not entirely sure how USB controllers function, but is it possible for a controller to reduce a ports speed if it runs out of available bandwidth? If it is possible, OPs USB controllers could be overloaded, and some stuff needs to be unplugged. 

 

Or its the cable

[SlayerOfHellWyrm]

1 minute ago, DrMacintosh said:

I'm not entirely sure how USB controllers function, but is it possible for a controller to reduce a ports speed if it runs out of available bandwidth? If it is possible, OPs USB controllers could be overloaded, and some stuff needs to be unplugged. 

 

Or its the cable

It depends on the architecture of the controller, and how many things are connected to the controller. There's STT and MTT-based controllers. If they are connecting a lot to one controller, yes, that'll start splitting bandwidth per port. STT (Single transaction translator) and MTT (Multi transaction translator) hub configs boil down to how the hub operates when you mix in different device speeds. STT is not ideal, but is fine in most circumstances, MTT is best. Essentially, STT uses one transaction translator which handles talking between LS and FS (low speed and full speed) USB devices when the device and controller speed doesn't match. With STT, that translator is on the hub controller, meaning when it has to drop speed to handle the slower device, the entire controller while temporarily drop in speed, until it needs to talk to a higher-speed device again. This can cause issues when you're loading a controller up with many highspeed and low speed devices operating at max bandwidth because that translation time causes delays in signal processing and this can cause speeds to waiver from the constant mode switching. With MTT, it's one translator per-port, so each port can swap speeds as needed and they don't affect the other ports. 

In terms of overloading a USB controller, when bandwidth runs out devices just fail to connect, and you'll get a warning message that it's out of resources (at least in Windows). This can also happen if you connect to many endpoints for that particular controller (not going to explain that rabbit hole, LTT did a video on it) and if you start drawing too much power. It's very rare for you to actually fully saturate a USB controller though, because it requires the full data rate all the time and that rarely ever happens.