Comment 138 for bug 1667750

I'm also seeing this in 20.04:

[ 110.467608] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.467613] xhci_hcd 0000:08:00.0: Looking for event-dma 000000086900cfd0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.478406] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.478412] xhci_hcd 0000:08:00.0: Looking for event-dma 000000086900cfe0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.479937] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.479942] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06000 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.482654] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.482660] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06010 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.499173] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.499178] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06020 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.505613] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.505618] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06030 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.505676] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.505678] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06040 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.505764] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.505766] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06050 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.507398] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.507405] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06060 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.509353] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.509359] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06070 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.510017] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.510021] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06080 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.516799] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.516806] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06090 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.516930] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.516934] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060a0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.521145] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.521151] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060b0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.546425] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.546431] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060c0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.546773] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.546778] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060d0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.546945] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.546948] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060e0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.547252] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.547256] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c060f0 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.547358] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.547360] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06100 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0
[ 110.550637] xhci_hcd 0000:08:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 110.550643] xhci_hcd 0000:08:00.0: Looking for event-dma 0000000861c06110 trb-start 000000086900cfb0 trb-end 000000086900cfb0 seg-start 000000086900c000 seg-end 000000086900cff0

When I see this in dmesg my browser sessions freeze, SSH sessions drop, and I seem to lose all connectivity. I don't have the issue on Wifi and I have tried 5 different USB/Thunderbolt Ethernet adapters.