What's interesting is on a Dell Optiplex 3080 with a Realtek 8169 adapter I have similar symptoms (extremely slow downloads in the KB/s, and frequent packet drops seen in captures). I'm seeing this also on Dell Precision 3650's with Intel I219-LM (rev 11) adapters.
The workaround above to disable auto power control resolves these symptoms on BOTH the Realtek 8169 and the Intel I219-LM adapters. Oddly enough, a Dell Precision 3630 with a slightly different variant of the Intel I219-LM (rev10) does not have the same issues. Not sure if any of this helps, but I was surprised to see it's not just Intel cards with these linux power control speed and packet loss symptoms... Mike -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.14 in Ubuntu. https://bugs.launchpad.net/bugs/1930754 Title: e1000e extremly slow Status in HWE Next: Fix Released Status in OEM Priority Project: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux-oem-5.13 package in Ubuntu: Invalid Status in linux-oem-5.14 package in Ubuntu: Invalid Status in linux source package in Focal: Invalid Status in linux-oem-5.10 source package in Focal: Fix Released Status in linux-oem-5.13 source package in Focal: Fix Released Status in linux-oem-5.14 source package in Focal: Fix Released Status in linux source package in Hirsute: Won't Fix Status in linux-oem-5.10 source package in Hirsute: Invalid Status in linux-oem-5.13 source package in Hirsute: Invalid Status in linux-oem-5.14 source package in Hirsute: Invalid Status in linux source package in Impish: Won't Fix Status in linux-oem-5.10 source package in Impish: Invalid Status in linux-oem-5.13 source package in Impish: Invalid Status in linux-oem-5.14 source package in Impish: Invalid Bug description: [Impact] e1000e on TGP PCH encounters a network speed issue that rx speed is below 1MB/s [Fix] Intel provides 2 patches to fix this https://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=263466 [Test] Verified by our Dell and Lenovo platforms and the bug reporter. [Where problems could occur] The fix only applies to e1000e with TGP PCH, and add a flag "E1000_FFLT_DBG_DONT_GATE_WAKE_DMA_CLK". The impact should be minimized and should not lead to other regressions. ============================= 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/hwe-next/+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
