One more thing, per my test, on LAN, you can kind of reproduce this issue by
On iperf server: 1. set packet delay to 5ms "tc qdisc add dev eno1 root netem delay 5ms" or "tc qdisc change dev eno1 root netem delay 5ms" 2. run iperf3 server by command "iperf3 -s" On Client (say the machine have this issue) to simulate download: "iperf3 -c SERVER_IP -R" -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.10 in Ubuntu. https://bugs.launchpad.net/bugs/1930754 Title: e1000e extremly slow Status in OEM Priority Project: Confirmed Status in linux-oem-5.10 package in Ubuntu: Confirmed Bug description: We have dell latitude 5420 & 5520 laptops with onboard intel ethernet controller. Problem is that the ethernet port is extremely slow. about 100kbyte/s download throughput while on a gigabit connection. Upload seems to work just fine. Also when I pxe boot the system it's also painfully slow. But here comes the funny part. When I attach a usb memory stick the throughput of the networkcontroller is as expected. I've used latest ubuntu 20.04.2 kernel 5.8.0-55 I've used latest ubuntu 20.04.2 kernel 5.10.0-1029-oem Turns out this problem is not showing up when I manually install the 5.8.18 kernel. Also when I create my own iso with the help of Cubic and install the 5.8.18 kernel in it the pxe boot is working as expected with high throughput system: Dell latitude 5420 + 5520 nic: Ethernet Connection (13) I219-LM ubuntu 20.04.2 module: e1000e Please assist. Thank you To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1930754/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
