Aspire TC 885 LAN disabled if using m.2 slot

Hi,

I have a Aspire TC 885, and was trying to add a m.2 device (google coral) but after adding it, my onboard LAN connection stopped working.

I had already installed a 2 port gigabit card which is still working, and I am also using all three SATA ports.

The system was working fine until I added the m.2 device.

Now the onboard LAN connector does not show any status LED or work at all. I am guessing this may be a limitation of the bus but I am purely speculating, as I did not think that onboard LAN would be effected.

Could anyone advise how I can get the LAN port to work again?

Thanks

[Edited the thread to add model name to the title]

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billsey

The block diagram shows only one PCIe lane going to that M.2 slot, so there might be issue with the Coral card due to that. Acer might also have thought that no one would be putting anything but a WLAN card in. I don't know why that would be reflected by the Ethernet port onboard though… They are on different PCIe channels.

BSM9

Thanks for the reply, had not seen that diagram before. Have you also got one for the other m.2 slot on the motherboard? I forgot to mention which slot I am using, I am using the other one (2280/2242)

BSM9

bumping for visibility

Commodore_1995#

Hello! When you disconnect the ssd m2, does the lan port work again?

BSM9

yes, removing it restores fuctionality

billsey

Yeah, I goofed up. That is the WLAN slot… Here is the SSD one:

So it is a co-lay between SATA and NVMe. Here's the bit for the Ethernet:

So they are on completely different channels, 6 vs. 21-24. It's got to be something weird the Coral card is doing, maybe address space conflicts?

BSM9

I am not really sure how the coral card could be interfering, but I guess I could try changing swapping the 2 port card with a 4 port one.

Kinda weird but hopefully that will resolve my issue.

Commodore_1995#

What is this bios version?

Commodore_1995#

When you plug in the ssd, are these options enabled or disabled?

billsey

He is not putting a SSD into the M.2 slot. The coral card is an AI accelerator that goes into either a SSD style or WLAN style M.2 slot and has drivers for Linux.