ADT-Link R43SG causes laptop touchpad to stop working
 
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ADT-Link R43SG causes laptop touchpad to stop working  

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ishikawa_goemon
(@ishikawa_goemon)
Trusted Member
Joined: 2 years ago
 

I followed the build guides of various other users to install an ADT-Link R43SG to an Nvidia GPU. This is in turn connected to an external ATX PSU (rated at 750watts).

The ADT-Link R43SG is connected to the laptop's second M.2 NVME drive and the GPU is fully connected to the PSU's PCIE power cables (so not drawing power from the ADT-Link's power pass through).

GPUs run as expected but for some reason, the laptop's touchpad stopped working. Looking in the Device Manager, I see that the "I2C HID Device" under Human Interface Devices (HID) has a Code 10 Error about "STATUS_DEVICE_POWER_FAILURE"

Interestingly enough

-when I don't power on the external GPU, my touchpad functionality returns

-removing and reinstalling the Intel Serial I/O drivers does not solve the problem

-DDU uninstalling and reinstalling Nvidia drivers did not solve the problem

-enabling and disabling the misbehaving device (I2C HID) still doesn't return touchpad functionality

-booting windows in Safe Mode with ADT-Link R43SG powered on also saw no touchpad functionality

 

Any ideas in what could be causing this or has this also been previously seen? Are there any registry level changes I can do to remedy this issue?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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ishikawa_goemon
(@ishikawa_goemon)
Trusted Member
Joined: 2 years ago
 

So have some additional data to provide. I tried turning on the laptop without the ADT-LINK R43SG being powered. As expected, the system failed to detect the ADT LINK and attached GPU.

I then turned on the PSU which powered up the GPU. Wanted to test and see if it was like TB3 where it would be detected automatically.

The GPU powered on but was not detected. I then turned off the laptop and after the lights went out on the ADT-LINK PCB, rebooted.

Oddly enough, the touchpad started working again with the ADT-Link connected and no error showed.

However, after the laptop went to sleep, the touchpad stopped working again. In fact, I started getting bluescreens caused by RTKvhd64.sys

I noted that this was associated with RealTek. Currently back to where the touchpad and ADT-Link work.

 

Based on this behavior, any suggestions on where to look or what to investigate further? Is this behavior you have seen before?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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ishikawa_goemon
(@ishikawa_goemon)
Trusted Member
Joined: 2 years ago
 

Continued to explore this problem and heard from a hardware engineer that a similar behavior had occurred while testing the Apple eGPU. Apparently, a dirty power supply was causing the I2C chip, which was running at a high frequency, to error out.

This seems to make sense since the touchpad is listed as an I2C device. Eventually, I got to a point where I was getting non-stop WHEA errors and no longer able to boot into Windows 10. This was so bad that even during a clean Windows install from USB boot media, the WHEA error would occur.

Disconnecting the M.2 NVME from the 2nd slot did not mitigate the behavior either. Something interesting I noted was that in device manager, I started seeing errors for a PCI-E device which was listed as having no drivers found.

This showed up even after I disconnected the ADT Link R43SG. Any thoughts on whether this looks more like hardware damage at this point or is it just a symptom of a messed up registry or update?

Anybody recall anything similar happening? I've trawled through the forums and haven't found anything related.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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