Update to my October post: Dell Precision 5520 and BIOS 1.7 using TB16. This is on Ubuntu 16.04.3, kernel 4.13.0
The issue is still present. I tried limiting the bandwidth using `ethtool -s eth0 speed 100 duplex full autoneg on` and also as described in this blog post: http://mark.koli.ch/slowdown-throttle-bandwidth- linux-network-interface and it *seems* to be making the issue less apparent, but still present. $ for i in 1 2 3 4; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done 2641b55ed2e203861fb6f642bb05b8f7 1.iso 63f41e8b8e4e5ad1909637dbd2efd849 2.iso ^C% $ sudo ethtool -s eth0 speed 100 duplex full autoneg on $ for i in 1 2 3 4; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done 4672ce371fb3c1170a9e71bc4b2810b9 1.iso 4672ce371fb3c1170a9e71bc4b2810b9 2.iso 4672ce371fb3c1170a9e71bc4b2810b9 3.iso 4672ce371fb3c1170a9e71bc4b2810b9 4.iso $ for i in 1 2 3 4; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done ed13e9c6c45f027f686000eccce42254 1.iso 4672ce371fb3c1170a9e71bc4b2810b9 2.iso ^C% Next, I tried disabling offloading as described above. I haven't reset the device to 1 Gbps before doing so. It seems to be working fine so far. I will leave it running for an hour over lunch today to be completely sure. $ sudo ethtool --offload eth0 tx off Actual changes: tx-checksumming: off tx-checksum-ipv4: off tx-checksum-ipv6: off tcp-segmentation-offload: off tx-tcp-segmentation: off [requested on] tx-tcp6-segmentation: off [requested on] $ sudo ethtool --offload eth0 rx off $ for i in 1 2 3 4 5 6; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done 4672ce371fb3c1170a9e71bc4b2810b9 1.iso 4672ce371fb3c1170a9e71bc4b2810b9 2.iso 4672ce371fb3c1170a9e71bc4b2810b9 3.iso 4672ce371fb3c1170a9e71bc4b2810b9 4.iso 4672ce371fb3c1170a9e71bc4b2810b9 5.iso 4672ce371fb3c1170a9e71bc4b2810b9 6.iso In about a week I will be able to test this on a 2017 XPS 9560 (non-DE) too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1667750 Title: xhci_hcd: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 2 comp_code 13 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1667750/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
