Lunar lake PCIE Crash while connecting EGPU

[Alfred_Yuu]

BSOD with stopcode (WHEA_UNCORRECTABLE_ERROR) pops out after receiving hundreds of corrected errors on pci express legacy endpoint.

This happens while running programs on egpu. I am currently using Dell's XPS 13 with Ultra 7 258V processor, linking my Rtx 4060 through Intel's JHL7540 Thunderbolt Controller.

I have installed every single driver available on Dell's official website and from windows updates. I am sure the problem is probably on the new laptop because I purchased a brand new thunderbolt cable and Razer core x chroma to prove my theory, and both the docking station and cable work on my previous xps 13 (1185g7). Will it be possible that intel releases patches on the cpu's thunderbolt controller?

Here is the error message i got from event viewer:

A corrected hardware error has occurred.

Component: PCI Express Downstream Switch Port
Error Source: Advanced Error Reporting (PCI Express)

Primary Bus:Device:Function: 0x2:0x1:0x0
Secondary Bus:Device:Function: 0x0:0x0:0x0
Primary Device Name:PCI\VEN_8086&DEV_15EF&SUBSYS_00008086&REV_06
Secondary Device Name:

A corrected hardware error has occurred.

Component: PCI Express Legacy Endpoint
Error Source: Advanced Error Reporting (PCI Express)

Primary Bus:Device:Function: 0x3:0x0:0x0
Secondary Bus:Device:Function: 0x0:0x0:0x0
Primary Device Name:PCI\VEN_10DE&DEV_2882&SUBSYS_27AA107D&REV_A1
Secondary Device Name:

[DhannielM_Intel]

Hello Alfred_Yuu, 

Thank you for posting in the community. To further investigate, I have a few questions I'd like to ask. Please see them below:

1. Is there a lightning symbol near the Type C port on your laptop?
2. Have you contacted Dell to verify if your laptop is Thunderbolt 4 certified?
3. Are there any yellow warning signs in the Device Manager?
4. Have you reached out to Dell for further assistance?

Additionally, I want to set the right expectations regarding this matter. Since you're using an Original Equipment Manufacturer (OEM) device, I can only provide general troubleshooting. If the issue persists after these steps, I recommend contacting Dell for further investigation.

To gain a comprehensive understanding of your system, please use the System Support Utility (SSU). This tool will generate a text file compiling all your system information. You can follow the instructions at this link and send the text file here: Help Guide for the Intel® System Support Utility

Best regards,

Dhanniel M.

Intel Customer Support Technician

[Alfred_Yuu]

Thank you for the reply.

Before uploading my laptop's info, i can first answer the question you raised.

1: Yes. Dell's XPS 13 series laptop usually equip with thunderbolt port only. In my case, both port on the left and right side are thunderbolt 4 compatible. There is no more physical ports on my laptop other than the two. (I also tried using both sides if you wonder)

2: Yes, or else my laptop would not be able to connect to my egpu at the first place.

3: No. When the egpu is connected but not in use, everything seems normal, even the thunderbolt controller at U.S.B. controller shows working properly.

4: Yes, actually, but they dont seem to be able offering any kind of professional help. Not even with reflecting issues and rolling patches on this matter. I have nowhere to ask for assistance but here.

You can find the SSU file of my laptop's info below. You may also want to take a look at the corrected errors I encountered before the crash. You can find it in my previous comment. My laptop also created tons of dump files while suffering from BSODs. I just don't know how to extract the files. Please guide me if further information is needed.

[Alfred_Yuu]

Besides, isnt lunar lake's thunderbolt controller integrated into the die's platform controller tile? (the one near filler tile) Strangely I have never received any updates or patches on the thunderbolt controller from both dell's official website and intel's page.

[DhannielM_Intel]

Hi Alfred_Yuu,

Could you please confirm whether you have the latest Thunderbolt driver and firmware from Dell? Have you tried using an older Thunderbolt driver for testing purposes? Additionally, could you check if there is a BIOS update available for your laptop? If an update is available, please consider installing it, as certain BIOS settings can impact eGPU functionality. Also, ensure that Thunderbolt Boot Support is enabled in your BIOS settings.

For extracting Event Viewer log files, please follow the steps outlined below:

1. Please provide an application event viewer log from your system. Below are the steps to generate the logs
   1. Right Click on the Start Button
   2. Click on Event Viewer
   3. Click on the chevron of the Windows Logs
   4. Right Click on the Application and select Save All Events As
   5. Save the file and send us a copy
   6. make sure to indicate the timestamp of the crash
2. Please provide an System event viewer log from your system. Below are the steps to generate the logs
   1. Right Click on the Start Button
   2. Click on Event Viewer
   3. Click on the chevron of the Windows Logs
   4. Right Click on the System and select Save All Events As
   5. Save the file and send us a copy
   6. make sure to indicate the timestamp of the crash

Best regards,

Dhanniel M.

Intel Customer Support Technician