ADB/MTP/Fastboot not recognised

First off, I run linux. This isn't a problem of drivers (at least it shouldn't be).

I've had Slim 9.0 on my tablet for what seems like forever. I haven't needed to plug it into a PC for over a year. Couple months ago I wanted to change what I had installed so I tried to plug it in. My laptop sees nothing at all.
It's normally really obvious when I plug in ANYTHING USB, example:

Code:

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==> /var/log/kern.log <==
Oct 23 00:50:09 localhost kernel: [1566149.116799] usb 1-4: new high-speed USB device number 41 using ehci-pci
Oct 23 00:50:09 localhost kernel: [1566149.241670] usb 1-4: New USB device found, idVendor=05c6, idProduct=6765
Oct 23 00:50:09 localhost kernel: [1566149.241682] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 23 00:50:09 localhost kernel: [1566149.241689] usb 1-4: Product: A0001
Oct 23 00:50:09 localhost kernel: [1566149.241696] usb 1-4: Manufacturer: OnePlus
Oct 23 00:50:37 localhost kernel: [1566178.011617] usb 1-4: USB disconnect, device number 41

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Now, my USB port felt kinda poop so I've ordered and installed a new USB board. Still nothing on my PCs.
Now the tablet will show AC/USB on the battery page depending on where I plug it in to charge. So I thought it might be the kernel but I swapped kernels and that didn't help. It doesn't show up in the bootloader or in fastboot either.

Anyone have any ideas?
Where do I go from here?
Is USB just dead?