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Recent Issues with Octo + Highflow Next

szeater

Newbie

Recent Issues with Octo + Highflow Next

vendredi 9 janvier 2026, 14:31

Hi,
I've been using Aquacomputer gear for a really long time and generally love it, but I'm running into some frustrating issues recently, so I'd love some assistance!

I'm currently running an Octo, Highflow Next and Farbwerk360. I have a setup with a physical ambient air sensor plugged into the Octo, the Highflow Next measures Water Temp., and I use Playground to calculate a DeltaT that I plug back into the Octo as a 'Software Sensor' which then drives some basic temperature target fan controllers.

Recently, I've been having issues where either:
  1. My fans suddenly blast to 100%
  2. They stay at a low speed, water temps exceed 45C and then the Highflow alarm triggers.
In the first instance, sometimes Aquasuite becomes unresponsive, and the only way to recover the situation is to restart the machine, or to disconnect and reconnect the Octo. Other times, the Playground has recognised that the Highflow data is no longer reliable, and falls back to 40C water temp, which generally pushes my fans to 100%.


In the second instance, Aquasuite is running seemingly fine, but all sensors are 'stuck'. So whatever my Delta has been calculated as at a point in time becomes fixed in place. The devices themselves continue to work (the Highflow display still cycles with updated data), and I can still control other aspects of the devices (such as RGBpx), however all sensor data is now stuck in place. I've also seen instances where the sensor data is 'stuck' for one or two of the devices, but eventually it spreads to all three (I am monitoring this both through Aquasuite and HWInfo. Another fun fact, if HWInfo isn't already running when these issues occur, it fails to launch properly). The only resolution here seems to be to disconnect and reconnect all the devices.


I've tried using different USB headers, different hubs, more/less fans/channels and also playing with the "Automatically reset USB connection in case of errors" setting in Aquasuite. When this setting is enabled, I can see the following error in the logs when the issue starts to arise:
{"Group":1,"UTC":"2025-12-04T13:25:12.8639044Z","Message":"Reset USB, Winusb locked, octo: 29738-28672","Source":"USB ERROR"}

This error doesn't always appear when the sensors freeze up, but it appears fairly regularly in the logs.

This is also the first instance of this occurring (4th December 2025), and the only Windows Update I can see around this time is for a Windows Defender Definition (KB2267602 (Version 1.441.702.0) & KB2267602 (Version 1.441.713.0).


Only other thing worth noting, this only really seems to happen when I'm playing a game (at the moment that's usually Escape from Tarkov). I haven't really noticed this on the desktop; although that said I wouldn't notice the second failure mode on the desktop as fan speeds shouldn't be ramping up in that scenario anyway.

Apologies for the brain dump, just trying to make sure I convey as much as possible. Any help will be greatly appreciated.

Teasuti

Junior Member

mardi 10 février 2026, 16:04

I'd start troubleshooting USB connectivity and drivers. Perhaps do some basic exclusion via trying the devices on a different computer. Rolling back the Windows to an earlier image backup would also worth trying, just to make sure it's not the updates that screwed with the environment. Trying it in a different OS is also an option: live USB boot, dual boot, etc. But to me this defo sounds like a USB problem, not necessarily an Aquacomputer/Aquasuite problem.

Speedy-VI

Senior Member

mercredi 11 février 2026, 05:16

FWIW, I agree with Teasuti – It could be USB related. Check Universal Serial Bus controllers and Universal Serial Bus devices in Device Manager to see if there are any USB devices that failed to enumerate or have any error message. The Octo should show up as a Universal Serial Bus device. Download USB Device Tree Viewer that will show the entire USB bus structure and port speeds, and flag a bunch of different problem codes. USB is quite resilient, but there is a lot going on under the hood. If a device is storming the bus or messing up the USB Stack, it can cause unpredictable problems with other USB devices.

I have an NVMe-USB bridge external drive carrier with a Realtek RTL9210B controller that will try to negotiate a 10Gbps link and work, but CRC errors build up until the USB Host and NVMe-USB Bridge controller initiate the Recovery Active state. Retrain is attempted for 12ms, after which the USB Host reduces the link speed to the next lower level and re-enumerates the NVMe-USB bridge controller, first at 5Gbps, and if that link is not stable, at 480Mbps. This will happen over and over again. The OS is loading and unloading drivers, the CPU is processing USB error signals. It sometimes causes problems with headset audio and other USB drives. It took me a while to figure out what was causing it.

You may have some other USB device that is misbehaving, and the problem is manifesting as communication problems between your Octo and Aquasuite. Disconnecting and reconnecting or rebooting both result in the Octo being re-enumerated, the USB Stack is happy, and the problem goes away, for a while. Is your High Flow Next or Farbwerk360 having communication problems? Have you tried sending new LED data to the Farbwerk or altering the High Flow Next LCD menus? If they are also behaving erratically when new data or configuration changes are sent, the same USB bus issue is probably causing it.

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